Countess Maria Andreyevna Rumyantseva née Matveyeva was a Russian lady in waiting and alleged royal mistress of Tsar Peter the Great. Wikipedia
Born: April 14, 1699
Died: May 14, 1788 (age 89 years)
Grandchildren: Nikolay Rumyantsev, Sergey Rumyantsev, Praskovya Gagarina, and more
Grandparent: Artamon Matveyev
Great grandchildren: Vera Vyazemskaya, Varvara Kagulskaya, Vasily Apraksin, and more
Children: Praskovya Bruce, Pyotr Rumyantsev, and Darya Rumyantseva
Parents: Andrey Matveyev