Catherine Stenbock (Swedish: Katarina Gustavsdotter Stenbock; 22 July 1535 at Torpa, Tranemo Municipality, Västergötland – 13 December 1621 at Strömsholm, Västmanland) was Queen of Sweden from 1552 to 1560 as the third and last wife of King Gustav I. Biography Early life Catherine Stenbock was the daughter of Riksråd Gustaf Olofsson Stenbock and Brita Eriksdotter Leijonhufvud, who was the sister of King Gustav's previous consort Margaret Leijonhufvud. She was thus the maternal niece of Queen Margaret and first cousin of the royal children of that marriage, including future kings John III of Sweden and Charles IX of Sweden. Her siblings included Ebba Stenbock. There is little information about her prior to her marriage. It is possible that she served as maid of honor to her aunt, the Queen, but either way, she was most certainly known to the King personally: due to the marriage of her aunt, her family belonged to the relations to the King named as Kungafränderna (`The King's Relations´), who played an important role at court, and participated in the family events of the monarch, as well as he was present at the weddings and other events of her family. Her parents were both favored by the monarch. Their marriage was hosted by the King in parallel to his own first marriage in 1531, her father founded his career as a riksråd upon his loyalty to the King, and her mother was in the King's confidence: it was said that "In her [Queen Margaret's] sister Bridget... he always had much trust". Upon the death of her aunt Queen Margaret in 1551, Catherine's mother Brita and aunt Martha Leijonhufvud, in succession to Christina Gyllenstierna, were entrusted the care of the royal children until the King married again, which he was expected to do. The King declared that a new marriage was necessary foremost because he needed a Queen for his court and a mother for his young children. In March 1552, he called her mother, her aunt Martha and her spouse, and the King's nephew Per Brahe the Elder who was married to Catherine's sister Beata, and it thought that her proposed the marriage to her family at this meeting. Her family was favorable to the match, as this would preserve the family connection they had made with the King through his previous marriage with Queen Margaret, an influence they would keep through Catherine. The reason the King