Alice Perrers was quite the ambitious mistress, though we have to have some sympathy for her—she has been hated in her time and ever since.
Anne Hyde nearly became Queen of England but died before her chance to. She was a commoner who, through good luck, became the mother of Queens Mary II and Anne.
When Anne Boleyn was executed, her husband famously moved on eleven days later. But her mother’s devastation often goes unnoticed.
Elizabeth Tailboys was a daughter of Henry VIII, but since she was illegitimate, her story isn't told much, though it seems quite fascinating.
Victoria, Princess Royal, the eldest daughter of Queen Victoria, wasn't just a regular Empress. She was a Crown Princess with liberal views she wasn't afraid to share.
Joan of England is not a very famous princess. You probably only know her since she died of plague. If only she'd listened to the mayor of Bordeaux...
Rosamund Clifford (c. 1150 - c. 1176) was Henry II of England's mistress. Unluckily for her, his wife was Eleanor of Aquitaine, who was not at all fond of The Fair Rosamund.
Hortense Mancini was quite an interesting lady. She had a husband who knocked out female servants’ front teeth, she ran away from him, and became a royal mistress.