Blanche II of Navarre was just supposed to be another royal bride who went on to have a million kids. But then, her mother and brother died, and she found herself murdered.
Blanche II of Navarre: The Inconvenient, Murdered Queen

Blanche II of Navarre was just supposed to be another royal bride who went on to have a million kids. But then, her mother and brother died, and she found herself murdered.
Margaret Pole had so many traitors in her family: she was the daughter of a traitor, the sister of a traitor, and the mother of a traitor. All that treason ended in her own death.
The mother of Mary, Queen of Scots probably lived a normal life. She was probably just a French princess who married the King of Scotland, right? Well, her life was the exact opposite.
Lettice Knollys was the wife of a guy named Robert Dudley, whom you may be familiar with, but she did way more than just marry him. The poor lady could never catch a break.
Elizabeth Báthory de Esced was an extremely rich woman who killed a bunch of servant women. Even though killing poor people was legal, Elizabeth ended up chained to a pillar.
Juana the "Mad" is known for being the insane woman who briefly ruled Castile. But the thing is, she was perfectly sane, it was the absolutely horrible men in her life that made her insane.