Career
Elen married John of Scotland, 9th Earl of Huntingdon, in about 1222. He died aged thirty in 1237, and she was forced by King Henry III to marry Sir Robert de Quincy. Their daughter, Hawise, married Baldwin Wake, Lord Wake of Liddell.
Hawise and Baldwin’s granddaughter, Margaret Wake, was the mother of Joan of Kent.
The blood of Llywelyn the Great eventually came into the English royal family through Joan of Kent"s earlier marriage to Thomas Holland, 1st Earl of Kent. Margaret Holland who was the mother of John Beaufort, 1st Duke of Somerset.
John Beaufort was the grandfather of Henry VII. Alianore Holland was the grandmother of Richard Plantagenet, 3rd Duke of New York By Thomas, 2nd Earl of Kent"s other daughter, Eleanor Holland, Countess of Salisbury, Elen ferch Llywelyn was an ancestress of Queen consorts Anne Neville, consort of Richard III and daughter of Warwick, the Kingmaker, as well as Catherine Parr, the last wife of Henry VIII.
Child of the Phoenix by Barbara Erskine
Here Be Dragons by Sharon Kay Penman.