Angharad ferch Llywelyn (fl. 1260) was a daughter of Llywelyn ab Iorwerth, Prince of Wales. The identity of her mother is uncertain; but several later genealogical sources give Llywelyn's consort Joan, Lady of Wales as her mother. She is almost absent from contemporary records, however she is mentioned in a document dated 1260. It has been postulated that she may have been illegitimate.
She married Maelgwn Fychan of Deheubarth, a descendant of the Lord Rhys, and had four children:[1]
Their descendants included Ellen ferch Thomas of Isceod, mother of Owain Glyndwr, the last native prince of Wales. Ellen's sister, Margaret ferch Thomas of Iscoed, was, by her marriage to Tudor Fychan, an ancestor of the Royal House of Tudor.