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King Christian IV of Denmark and Norway; Credit – Wikipedia

April 12, 1555 – Death of Juana I, Queen of Castile and León and Queen of Aragon at the Royal Convent of Santa Clara in Tordesillas, Castile, now in Spain; buried at the Royal Chapel of Granada, now in Spain
Juana was the daughter of Ferdinand II, King of Aragon and Isabella I, Queen of Castile and León, and the elder sister of Catherine of Aragon, the first wife of King Henry VIII of England. She married Philip of Austria, often called Philip of Habsburg or Philip the Handsome. He was the heir of Mary, Duchess of Burgundy in her own right, the ruler of a collection of states known as the Burgundian State, and Maximilian I, Holy Roman Emperor. Juana was declared insane and confined in the Royal Convent of Santa Clara in Tordesillas under the orders of her father, who ruled as regent until he died in 1516, when she inherited his kingdom as well. From 1516, when her son Charles I ruled as king, she was nominally co-monarch but remained confined until her death. Juana’s death resulted in the personal union of Spain and the Holy Roman Empire, as her son Charles V, Holy Roman Emperor, also became King of Castile and Aragon. Most historians now agree that Juana was clinically depressed and not insane, as commonly believed.
Unofficial Royalty: Juana I, Queen of Castile and León and Queen of Aragon

April 12, 1577 – Birth of King Christian IV of Denmark and Norway at Frederiksborg Palace in Hillerød, Denmark
Having reigned for 59 years, Christian IV, King of Denmark and Norway, is the longest-reigning monarch of Denmark and one of the most beloved. In 1588, Christian IV succeeded to the throne at the age of eleven. He married Anna Katharina of Brandenburg in 1597, and the couple had six children. Christian had affairs and illegitimate children. After his wife’s death, he married 18-year-old Kirsten Munk, from a wealthy, untitled noble Danish family in 1615. Kirsten was not the Queen due to the morganatic marriage and was given the title, Countess of Schleswig-Holstein. Their ten children married into the Danish nobility, were styled Count and Countess of Schleswig-Holstein, and did not have succession rights. Christian IV and Kirsten’s stormy marriage ended in divorce in 1630, amid mutual allegations of infidelity and much bitterness. During his long reign, Christian IV repeatedly and unsuccessfully attempted by military means to make the Kingdom of Denmark and Norway into a great power, especially during the Thirty Years’ War. However, his legacy would be his building projects, and his cipher C 4 can be seen on many buildings in Denmark. Sensing he did not have a long time to live, Christian IV requested to be brought to his beloved Copenhagen. On February 21, 1648, he was carried in a litter from Frederiksborg Palace to Copenhagen. He died a week later, on February 28, 1648, at Rosenborg Castle, at the age of 70.
Unofficial Royalty: King Christian IV of Denmark and Norway

April 12, 1834 – Death of Isabella Ingram-Seymour-Conway, Marchioness of Hertford, mistress of King George IV of the United Kingdom, at Ragley Hall in Alcester, Warwickshire, England;  buried at the Holy Trinity Church in Arrow, Warwickshire, England
Isabella was the daughter of Charles Ingram, 9th Viscount of Irvine and Frances Shepherd. Charles Ingram was a prominent landowner and politician and served as a Groom of the Bedchamber to King George III from 1756 until 1763. Isabella replaced Maria Fitzherbert, the long-time mistress of the Prince of Wales, the future King George IV, and was his mistress from 1807-1819. She died on April 12, 1834, having lived through the entire reign of her former lover as King George IV and the succession of his younger brother, King William IV.
Unofficial Royalty: Isabella Ingram-Seymour-Conway, Marchioness of Hertford, mistress of King George IV of the United Kingdom

April 12, 1866 – Birth of Princess Viktoria of Prussia, granddaughter of Queen Victoria, at Neues Palais in Potsdam, Kingdom of Prussia, now in Brandenburg, Germany
Full name: Frederica Amalia Wilhelmine Viktoria
Princess Viktoria, known in the family as Moretta, was the daughter of Victoria, Princess Royal and Friedrich III, German Emperor, King of Prussia. In 1890, she married Prince Adolf of Schaumburg-Lippe. Moretta suffered a miscarriage early in the marriage, and the couple never had children.  After Adolf’s death, she made a controversial marriage to Alexander Zoubkov, a Russian refugee described as a “dancer”, who was 35 years younger and carelessly spent her money. Moretta was forced to sell the contents of Palais Schaumburg, her home in Bonn, Germany, but the sale did not net much money, and she moved into a single furnished room in the Bonn suburb of Mehlem. In 1929, Moretta announced that she was divorcing her second husband, but she died of pneumonia a few days later at the age of 63.
Unofficial Royalty: Princess Viktoria of Prussia, Princess of Schaumburg-Lippe, Mrs. Zoubkoff

April 12, 1869 – Death of Ida of Waldeck and Pyrmont, wife of Georg Wilhelm, Prince of Schaumburg-Lippe, in Menton, Alpes-Maritimes, France; buried in the Princely Mausoleum at the Evangelical Lutheran St. Martini Church in Stadthagen, Principality of Schaumberg-Lippe, now in the German state of Lower Saxony
The daughter of Georg I, Prince of Waldeck and Pyrmont, in 1816, Ida married Georg Wilhelm, Prince of Schaumburg-Lippe. The couple had nine children whose births spanned twenty-four years. As the Princess of Schaumburg-Lippe, Ida was concerned with social issues, arranging food for the poor, providing debt relief, and other humanitarian initiatives. Ida survived her husband by nine years, dying on April 12, 1869, in Menton, Alpes-Maritimes, France at the age of 72. She was buried with her husband in the Princely Mausoleum at St. Martini Church.
Unofficial Royalty: Ida of Waldeck and Pyrmont, Princess of Schaumberg-Lippe

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Augusta Viktoria of Schleswig-Holstein-Sonderburg-Augustenburg, German Empress; Credit – Wikipedia

April 11, 1240 – Death of Llywelyn Fawr (the Great), Prince of Gwynedd, Prince of Southern Powys at the Abbey of Aberconwy in Wales, buried at the Abbey of Aberconwy
Llywelyn was the topic of the late Sharon Kay Penman’s excellent historical novel “Here Be Dragons.” Llywelyn ap Iorwerth (“ap” means “son of”), later known as Llywelyn Fawr (Llywelyn the Great) was the longest-reigning ruler of Welsh principalities, maintaining control for 45 years. He was Prince of Gwynedd and Prince of Powys Wenwynwyn. In 1216, Llewellyn received the fealty of other Welsh lords and, although he never used the title, was the de facto Prince of Wales. Llywelyn dominated Wales for 45 years and was one of only two Welsh rulers called “the Great”, the other being his ancestor Rhodri the Great.
Unofficial Royalty: Llywelyn Fawr, Prince of Gwynedd, Prince of Southern Powys

April 11, 1611 – Birth of Karl Eusebius, Prince of Liechtenstein
In 1627, when Karl Eusebius was fifteen years old, his father Karl I, the first Prince of Liechtenstein, died, and he became the second Prince of Liechtenstein. In 1644, Karl Eusebius married his niece Johanna Beatrix of Dietrichstein, and they had nine children. Karl Eusebius I successfully consolidated and rebuilt the House of Liechtenstein territories devastated by the Thirty Years’ War. He left his son and successor, Hans-Adam I, Prince of Liechtenstein, a rich inheritance and an extensive collection of artworks that were multiplied by his son and other descendants. The current Prince of Liechtenstein, Hans-Adam II, is the richest European monarch. After a reign of 57 years, Karl Eusebius died at the age of 72, on April 5, 1684.
Unofficial Royalty: Karl Eusebius, Prince of Liechtenstein

April 11, 1624 – Birth of Maria Ilyinichna Miloslavskaya, Tsaritsa of All Russia, first wife of Alexei I, Tsar of All Russia, in Moscow, Russia
In 1648, Maria Ilyinichna married Alexei I, Tsar of All Russia. They had thirteen children, including two Tsars of All Russia, Fyodor III and Ivan V, and Sophia Alexeevna, who served as Regent for her brother Ivan V and half-brother Peter I (the Great). During this time, the life of Russian noblewomen, including the Tsaritsa of All Russia, was not a public one. They were expected to live in seclusion with little contact with men. Maria Ilyinichna was mainly involved in charitable and religious activities such as donating to facilities for the poor, sick, and disabled. On March 13, 1669, 45-year-old Maria Ilyinichna died of puerperal fever (childbed fever) five days after her most difficult childbirth. Her thirteenth child, Yevdokia Alexeevna, lived for only two days.
Unofficial Royalty: Maria Ilyinichna Miloslavskaya, Tsaritsa of All Russia

April 11, 1921 – Death of Augusta Viktoria of Schleswig-Holstein-Sonderburg-Augustenburg (called Dona), German Empress, first wife of Wilhelm II, German Emperor, at Huis Doorn in the Netherlands; buried in the Antique Temple in the garden of Sanssouci Palace in Potsdam, Germany
Known as Dona, she was a great-niece of Queen Victoria, a niece of Prince Christian of Schleswig-Holstein, the husband of Queen Victoria’s daughter Princess Helena, and a descendant of Danish and British kings. In 1881, Dona married the future Wilhelm II, German Emperor and King of Prussia. They had six sons and one daughter. When Dona became German Empress and Queen of Prussia in 1888, she took up and enjoyed the traditional roles of a consort, serving as a hostess and working with charities. Dona’s health had started to fail even before Wilhelm lost his throne in the aftermath of World War I, which necessitated their going into exile in the Netherlands. In 1920, Dona and Wilhelm’s youngest son Joachim died by suicide. Dona never got over her son’s death, and she died five months later. Dona had wanted to be buried in Germany, but this meant that Wilhelm would never be able to visit her grave as he was exiled.  The German government agreed to the burial but insisted that the special train that carried Dona’s coffin only travel at night and that there should be no announcement of the arrangements. Dona was still popular with the German people, and even though there were no announcements about the arrangements, the 600-kilometer route through Germany was lined with people.
Unofficial Royalty: Augusta Viktoria of Schleswig-Holstein-Sonderburg-Augustenburg, German Empress, Queen of Prussia

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© Unofficial Royalty 2025

James V, King of Scots; Credit – Wikipedia

April 10, 1512 – Birth of James V, King of Scots at Linlithgow Palace in Scotland
James V was the son of James IV, King of Scots and Margaret Tudor, daughter of King Henry VII of England and sister of King Henry VIII of England. In 1513, 30-year-old James IV was killed in the Battle of Flodden, and 17-month-old James V succeeded his father. In 1537, James married Madeleine of Valois, daughter of King François I of France. Already ill with tuberculosis, Madeleine died six months after the wedding. Less than a year later, James married another French bride, Marie of Guise, the eldest daughter of Claude of Lorraine, Duke of Guise. The couple had two sons who died in infancy, and one daughter, the future Mary, Queen of Scots. When Henry VIII of England broke from the Roman Catholic Church, he asked James V, his nephew, to do the same. James ignored his uncle’s request and insulted him further by refusing to meet with Henry VIII in York. Furious, Henry VIII sent troops against Scotland. In retaliation for the English raid into Scotland, James raised an army and attacked England. On November 24, 1542, the Battle of Solway Moss resulted in a decisive English victory. After the battle,  James V fled to Falkland Palace, where he became ill and took to his bed. Overcome with grief and shame about the Battle of Solway Moss, James V lost the will to live. The news that his wife Marie of Guise had given birth to a daughter did nothing to raise his spirits, and he died at the age of 30 and was succeeded by his only surviving legitimate child, six-day-old Mary.
Unofficial Royalty: James V, King of Scots

April 10, 1533 – Death of King Frederik I of Denmark and Norway at Gottorp Castle in Schleswig, now in Schleswig-Holstein, Germany; buried at the Cathedral of St. Peter in Schleswig
Frederik I, King of Denmark and Norway was the youngest of the four sons and the youngest of the five children of Christian I, King of Denmark, Norway, and Sweden. Frederik’s nephew Christian II, King of Denmark, Norway, and Sweden had been deposed in Sweden in 1521 and replaced by Gustav Vasa, the first monarch of the Swedish House of Vasa. In 1523, Christian II was forced to abdicate by the Danish nobles. Frederik, his paternal uncle, was offered the crown. Frederik was the last Roman Catholic Danish monarch. All subsequent Danish monarchs have been Lutheran. Although Frederik remained Catholic, he was somewhat tolerant of the new Protestant Lutheran religion. He ordered Lutherans and Roman Catholics to share the same churches and encouraged the first publication of the Bible in the Danish language. Frederik’s attitude toward religion postponed the all-out warfare between Protestants and Roman Catholics that occurred during the reign of his son King Christian III, which ultimately turned Denmark into a Protestant nation. After a reign of ten years, King Frederik I died on April 10, 1533, aged 61.
Unofficial Royalty: King Frederik I of Denmark

April 10, 1599 – Death of Gabrielle d’Estrées, mistress of King Henri IV of France, in Paris, France; buried at the Notre-Dame-La Royale Church at Maubuisson Abbey on the outskirts of Paris, France
Gabrielle d’Estrées was the mistress of King Henri IV of France from 1591 until she died in 1599. In addition to being his mistress, she was one of his closest confidantes and advisers and was instrumental in Henri’s renunciation of Protestantism and conversion to Catholicism. Pregnant with her fourth child, Gabrielle suffered an attack of eclampsia and gave birth to a stillborn son. Grief-stricken, King Henri IV decreed that she be given the funeral of a Queen, and wore all black while he was in mourning – something that had never been done before in the French royal family. Gabrielle’s funeral was held at the Church of Saint-Germain-l’Auxerrois, with her coffin traveling in a procession that included princes, princesses, and many of the highest nobility of France.
Unofficial Royalty: Gabrielle d’Estrées, mistress of King Henri IV of France

April 10, 1742 – Death of Wilhelmine Amalie of Brunswick-Lüneburg, Holy Roman Empress, wife of Joseph I, Holy Roman Emperor, at the Monastery of the Visitation of Mary in Vienna, Austria that she had founded; buried in the crypt under the high altar of the monastery’s church where the Salesian nuns are buried
When the future Holy Roman Emperor Joseph I began having affairs at the age of 15, his mother thought the pious Roman Catholic Wilhelmine Amalie, who was five years older than Joseph, would be a positive influence on Joseph and he would then stop having affairs. The couple married in 1699, and had three children, but their only son died from hydrocephalus before his first birthday. Joseph did not stop his affairs, and the affairs combined with the death of his only son took a toll on his marriage. In 1705,  Joseph succeeded his father in the Habsburg hereditary lands and was elected Holy Roman Emperor. Six years later, Joseph died from smallpox. In 1722, after both her daughters had married, Wilhelmine Amalie retired to the convent she had founded for the Salesian nuns, the Monastery of the Visitation of Mary in Vienna, where she died eleven days before her sixty-ninth birthday.
Unofficial Royalty: Wilhelmine Amalie of Brunswick-Lüneburg, Holy Roman Empress

April 10, 1811 – Birth of Charlotte Montagu Douglas Scott, Duchess of Buccleuch and Queensberry, Queen Victoria’s Mistress of the Robes 1841–1846, at Longleat in Wiltshire, England
Born Lady Charlotte Thynne, the daughter of Thomas Thynne, 2nd Marquess of Bath, Charlotte married Walter Montagu Douglas Scott, 5th Duke of Buccleuch and 7th Duke of Queensberry, in 1829.
Unofficial Royalty: Charlotte Montagu Douglas Scott, Duchess of Buccleuch and Queensberry

April 10, 1837 – Death of Sophia Sidney, Baroness De L’Isle and Dudley, born Sophia FitzClarence, illegitimate daughter of King William IV of the United Kingdom, at Kensington Palace in London, England; buried in the Sidney Chapel at St. John the Baptist Church in Penshurst, Kent, England 
Sophia was the third of the ten children and the eldest of the five daughters of King William IV of the United Kingdom and his mistress Dorothea Jordan. In 1825, Sophia married Philip Charles Shelley Sidney, the only son of Sir John Shelley-Sidney, 1st Baronet, and the couple had six children. On April 10, 1837, 40-year-old Sophia died after delivering a premature stillborn baby at Kensington Palace. She had recently completed a charming watercolor painting of her father. Sophia’s death had a severe impact on her father, King William IV, who died two months later on June 20, 1837.
Unofficial Royalty: Sophia Sidney, Baroness De L’Isle and Dudley, born Sophia FitzClarence, Illegitimate Daughter of King William IV of the United Kingdom

April 10, 1897 – Death of Friedrich Franz III, Grand Duke of Mecklenburg-Schwerin at Villa Wenden in Cannes, France; buried in the Helena Pavlovna Mausoleum on the grounds of Ludwigslust Palace in Ludwigslust, Grand Duchy of Mecklenburg-Schwerin, now in Mecklenburg-Vorpommern, Germany
In 1879, Friedrich Franz married Grand Duchess Anastasia Mikhailovna of Russia, the daughter of Grand Duke Mikhail Nikolaevich of Russia and Princess Cecilie of Baden. The couple had three children, and through their daughter Alexandrine, who married King Christian X of Denmark, they are ancestors of the Danish royal family. Friedrich Franz suffered from severe bronchial asthma and a weak heart that plagued him his entire life. Because the climate in Schwerin was not good for his health, he spent November through May in Cannes, France, living at Villa Wenden, which he had built there. With his health rapidly deteriorating in the spring of 1897, his family gathered at Villa Wenden, anticipating the worst. On the evening of April 10, 1897, he was found unconscious at the bottom of the villa’s 25-foot retaining wall, and he soon died. Officially, the cause of death was an accident. Likely gasping for air, he went out on the balcony and accidentally fell. However, rumors quickly spread that he had died by suicide.
Unofficial Royalty: Friedrich Franz III, Grand Duke of Mecklenburg-Schwerin

April 10, 1904 – Death of Queen Isabella II of Spain in exile in Paris, France; buried at the Monasterio de El Escorial near Madrid, Spain
Isabella’s father, Ferdinand VII, died in 1833, and she succeeded to the throne, not quite three years old. Isabella married her double first cousin, Infante Francisco de Asís de Borbón, Duke of Cadiz, but the marriage was not happy. There were rumors that few, if any of her children were fathered by her husband. Isabella had nine children, but only five reached adulthood. Her only surviving son was King Alfonso XII of Spain. Isabella’s authoritarianism, her religious fanaticism, her alliance with the military, and the chaos of her reign — sixty different governments — helped bring about the Revolution of 1868 that exiled her to Paris. The new government replaced Isabella with Amadeo I, the second son of King Victor Emmanuel II of Italy.  During Amadeo’s reign, there were many republican uprisings, and he abdicated in 1873 and returned to Italy. The First Spanish Republic was declared, but it lasted a little less than two years.  Isabella had officially abdicated in 1870, and after the First Spanish Republic collapsed, her son Alfonso XII became king. She lived out the rest of her life in exile and died from influenza complications in Paris, France.
Unofficial Royalty: Queen Isabella II of Spain

April 10, 1959 – Wedding of Emperor Emeritus Akihito of Japan and Michiko Shōda at the Kashiko-dokoro, the Shinto shrine of Amaterasu, the Sun Goddess, on the grounds of the Imperial Palace in Tokyo, Japan
Crown Prince Akihito and Michiko Shōda first met on a tennis court on August 19, 1956, at Karuizawa, a summer resort. Akihito and Michiko were in opposing mixed pairs in a tournament. Michiko and her partner won the match.  Michiko was the first commoner to marry into the Imperial Family, and that did cause some controversy.
Unofficial Royalty: Wedding of Emperor Akihito of Japan and Michiko Shōda

April 10, 1973 – Birth of Princess Tatjana of Liechtenstein, daughter of Prince Hans-Adam II of Liechtenstein, born in St. Gallen, Switzerland
Full name: Tatjana Nora Maria
As Liechtenstein follows agnatic primogeniture (male-only), neither Princess Tatjana nor her children are in the line of succession to the throne of Liechtenstein. In 1999, Princess Tatjana married Baron Philipp von Lattorff and the couple has seven children.
Unofficial Royalty: Princess Tatjana of Liechtenstein

April 10, 2007 – Birth of Princess Ariane of the Netherlands, daughter of King Willem-Alexander of the Netherlands, at Bronovo Hospital in The Hague, the Netherlands
Full name: Ariane Wilhelmina Máxima Inés
Ariane is the youngest of the three daughters of King Willem-Alexander of the Netherlands and Queen Máxima (née Máxima Zorreguieta Cerruti).
Unofficial Royalty: Princess Ariane of the Netherlands

This article is the intellectual property of Unofficial Royalty and is NOT TO BE COPIED, EDITED, OR POSTED IN ANY FORM ON ANOTHER WEBSITE under any circumstances. It is permissible to use a link that directs to Unofficial Royalty.