Matilda of Flanders (c. 1031 – 2 November 1083) was the wife of William the Conqueror and, as such, Queen consort of the Kingdom of England. She bore William nine children, including two kings, William II and Henry I.
The Matilda effect is the systematic repression and denial of the contribution of women scientists in research, whose work is often attributed to their male colleagues. This effect was first described in 1993 by science historian Margaret W. Rossiter. It is named after the U.S. women's rights activist Matilda Joslyn Gage, who first observed this phenomenon at the end of the 19th century. (from Wikipedia)
Mathilde Kschessinskaya, mistress of Nicholas II, Sergei Mikhailovich and his cousin Andrei Vladimirovich. In 1902, she gave birth to a son, Vladimir (known as "Vova"; 30 June 1902 - 23 April 1974); he was later given the title Prince Romanovsky-Krasinsky, but said that he never knew for sure who his father was. Matilda is pictured costumed for the title role in Petipa's La Camargo. St. Petersburg, circa 1902.