In Hwfa 1, Bartrum gives this note which he says also applies here:
Bartrum notes that "All the early pedigrees in which this marriage [to Angh. f. Tudur] occurs are wrong, viz. Dd. Ll ap Gron ap Cyn ap Gron ap Ieth. Angharad is made the wife of Cyn ap Gron ap Ieth (T 226, etc.) R 280 (quoted RV 931), WC 104 SV 346a. The marriage is supposed to explain how Trefilir came to this family. Angharad was perhaps another wife of Cyn ap Gron ap Cyn (p. 2) as in Ch. 4. 40, 49v.
