Augusta Victoria of Schleswig-Holstein was a minor princess distantly related to Queen Victoria, and married a distant relative, the last Kaiser of Germany.
Augusta Victoria of Schleswig-Holstein: The Last German Empress
Victoria, Princess Royal: Empress Frederick
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.
Marie-Adélaïde, Grand Duchess of Luxembourg
Marie-Adélaïde of Luxembourg isn't a name you might have heard. This woman did a ton of stuff though — including pretty much running away from her own country.
Margherita of Savoy, Queen of Italy
Margherita of Savoy was the first woman to hold the title of Queen of Italy. She's also my favorite historical figure because she's just amazing.
The Tragic Life of Mafalda of Savoy
Princess Mafalda of Savoy did nothing except exist, which made Hitler pretty angry. She met a terrible end in a terrible concentration camp.
The Royal Women 