John de Southeray John de Southeray John de Southeray (1364 - 1383) was an illegitimate son of King Edward III of England by his mistress Alice Perrers. He was the oldest of Perrers' three acknowledged illegitimate children by her royal lover. He was knighted in April 1377, alongside the future King Richard II. That same year, he was married to a daughter of Henry de Percy, 3rd Baron Percy; she divorced him in 1380, claiming she had not consented to the marriage. During the abortive Castilian campaign led by his half-brother the Earl of Cambridge in 1381, John led a contingent of English
Alice Perrers King Edward, all while their relationship was a secret from his wife, Queen Philippa and the public. In 1364, aged 16, Perrers gave birth to a son later named Sir John de Southeray (c. 1364-1383). John later married Maud Percy, daughter of Henry Percy, 3rd Baron Percy, and his first wife Mary of Lancaster. A year later in 1365, Perrers gave birth to Jane (c. 1365-unknown). Jane married Richard Northland. Aged 18, Alice gave birth to her third child, Joan (c. 1366-bef January 1431). Joan married Robert Skerne, a lawyer who served as a tax official and a Member of