Peter III of Russia
Empress Elizabeth arranged for Peter to marry his second cousin, Sophia Augusta Frederica (later Catherine the Great), daughter of Christian August, Prince of Anhalt-Zerbst and Johanna Elisabeth of Holstein-Gottorp. The young princess formally converted to Russian Orthodoxy and took the name Ekaterina Alexeievna (i.e., Catherine). They married on 21 August 1745. The marriage was not a happy one but produced one son, the future Emperor Paul, and one daughter, Anna Petrovna (20 December 1757 – 19 March 1759). Catherine later claimed that Paul was not fathered by Peter: that, in fact, they had never consummated the marriage. During the sixteen years of their residence in Oranienbaum, Catherine took numerous lovers, while her husband did the same in the beginning.
John III of Sweden
John cared for Karin and their children even after he married Catherine Jagellonica, in 1562. He got Karin a husband that would care for her and the children: in 1561, she married the nobleman Klas Andersson (Västgöte), a friend and servant of John. They had a daughter named Brita. He continued supporting Karin and his illegitimate children as a king, from 1568. In 1572 Karin married again, as her first husband was murdered by Erik XIV in 1563, to a Lars Henrikson, whom John ennobled in 1576 to care for his issue with Karin. The same year, he made his daughter Sofia a lady in the castle, as a servant to his sister Princess Elisabet. In 1580, John married her to Pontus de la Gardie. She later died giving birth to Jacob De la Gardie.