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.
Catherine Ingesdotter of Sweden
Catherine's father died in 1110, and was succeeded on the Swedish throne by his nephews. By the time of her father's death, Catherine would still have been a child. Her mother is reported to have entered Vreta Abbey as a widow. Her eldest sister, Christina, lived in Russia, and was in Sweden considered as to far away to be given a share in the inheritance of their father. Their sister Margaret was at this point queen of Denmark. It is known that Margaret shared her inheritance with her niece Ingrid in Norway, and her niece Ingeborg in Denmark. Catherine is not mentioned in these transactions, but as the only unmarried daughter of Inge left in Sweden, she would have been one of his heirs.