Earl of Richmond Edmund Tudor
was born illegitimate circa 1430; Edmund's father, Owen Tudor, was a Welsh clerk in Catherine's household, and after the death of Catherine's husband, Henry V, Owen and Catherine had a clandestine affair that resulted in the birth of Edmund. He was the son of Owen Tudor
and Catherine of Valois (?)
. Earl of Richmond Edmund Tudor married Lady Stanley Margaret Beaufort
, daughter of Duke of Somerset John Beaufort
and Margaret Beauchamp
, in 1455. Earl of Richmond Edmund Tudor died circa November 1456; Edmund died while a prisoner of Yorkists.