Paul I of Russia
Paul remained overshadowed by his mother for most of his life. His reign lasted four years, ending with his assassination by conspirators. He adopted the laws of succession to the Russian throne—rules that lasted until the end of the Romanov dynasty and of the Russian Empire. He also intervened in the French Revolutionary Wars and, toward the end of his reign, added Kartli and Kakheti in Eastern Georgia into the empire which was confirmed by his son and successor Alexander I.
Elizabeth of Russia
The young Peter had lost his mother, Elizabeth's sister Anna, at three months old and his father at the age of eleven. Elizabeth invited her young nephew to Saint Petersburg, where he was received into the Orthodox Church and proclaimed heir on 7 November 1742. Elizabeth gave him at once Russian tutors. Keen to see the dynasty secured Elizabeth settled on Princess Sophie of Anhalt-Zerbst as a bride for her nephew. Incidentally, Sophie's mother, Joanna Elisabeth of Holstein-Gottorp, was a sister of Elizabeth's own fiancé who had died before the wedding. On her conversion to the Russian Orthodox Church Sophie was given the name Catherine in memory of Elizabeth's mother. The marriage took place on 21 August 1745. Nine years later, a son, the future Paul I, was finally born on 20 September 1754.