Lola Montez, mistress of King Ludwig of Bavaria; Credit – Wikipedia
- Lover: a person who has a sexual or romantic relationship with another
- Mistress: a woman who has a continuing, extramarital sexual relationship with one man
This does not purport to be a complete list.
- Lola Montez, mistress of King Ludwig I of Bavaria
- Philip Christoph von Königsmarck, lover of Sophia Dorothea of Celle, Electoral Princess of Hanover, wife of the future King George I of Great Britain