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.
Richard III of England
Michael Hicks and Josephine Wilkinson have suggested that Katherine's mother may have been Katherine Haute, on the basis of the grant of an annual payment of 100 shillings made to her in 1477. The Haute family was related to the Woodvilles through the marriage of Elizabeth Woodville's aunt, Joan Woodville, to William Haute. One of their children was Richard Haute, Controller of the Prince's Household. Their daughter, Alice, married Sir John Fogge; they were ancestors to queen consort Catherine Parr, sixth wife of King Henry VIII. They also suggest that John's mother may have been Alice Burgh. Richard visited Pontefract from 1471, in April and October 1473, and in early March 1474, for a week. On 1 March 1474, he granted Alice Burgh £20 a year for life "for certain special causes and considerations". She later received another allowance, apparently for being engaged as nurse for Clarence's son, Edward of Warwick. Richard continued her annuity when he became king. John Ashdown-Hill has suggested that John was conceived during Richard's first solo expedition to the eastern counties in the summer of 1467 at the invitation of John Howard and that the boy was born in 1468 and named after his friend and supporter. Richard himself noted John was still a minor (not being yet 21) when he issued the royal patent appointing him Captain of Calais on 11 March 1485, possibly on his seventeenth birthday.