premise: Elizabeth of York's father was Edward IV.
hypothesis: Catherine or Katherine of York ( 14 August 1479 -- 15 November 1527 ) was the ninth child and sixth daughter of King Edward IV by his wife Elizabeth Woodville . Elizabeth of York . She was the daughter of Edward IV and niece of Richard III , and she married the king following Henry 's victory at the Battle of Bosworth which started the last phase of the Wars of the Roses . The period of Henry VI 's readaption from October 1470 until April 1471 and the period between her father 's death in 1483 , when she was 17 , and the making of peace between her mother and her uncle Richard were violent and anxious interludes in what was mostly a peaceful life .