The Barons de Braose

Elen married John de Scotia, Earl of Chester, in about 1222. He died aged thirty in 1237, and she re-married, her second husband being Sir Robert de Quincy. Their daughter, Hawise, was married to Baldwin Wake, Lord Wake of Lidel. Hawise and Baldwin’s granddaughter, Margaret Wake , was the mother of Joan of Kent, later Princess of Wales.

There is also a record of a "Helen" daughter of "Llywelyn of Wales" who married Mormaer Maol Choluim II, Earl of Fife and later married Domhnall I, Earl of Mar. The dates appear to rule out this being Elen, since Maol Chaluim II did not die until 1266 while Elen's death is recorded in 1253. Some genealogists propose the existence of another Elen, an illegitimate daughter born towards the end of Llywelyn's life, but there is no clear evidence for this. Another possibility is that this Helen might have been an illegitimate daughter of Llywelyn the Last born when he was a young man, but there is also no evidence of the theory being true.