Llewelyn ap Dafydd, Constable of Rhuddlan

reference for illegitimate son, Llewelyn ap Dafydd, The Royal Descents of 600 Immigrants, compiled by Gary Boyd Roberts (sources: TAG 52 (1976): 142-44; Bartram 1, pp. 446-47, 867, 869, 512: Bartram 2, pp. 975, 1288-89 (generations 1-15).

Please see Darrell Wolcott: Osbwrn Wyddel of Cors Gedol; http://www.ancientwalesstudies.org/id203.html. (Steven Ferry, August 30, 2020.)

Please see Peter Bartrum: Gruffudd ap Cynan 5; https://www.geni.com/documents/view?doc_id=6000000173392536826 (Steven Ferry, October 29, 2023.)

Corrected based on charting provided by Darrell Wolcott, Center for the Study of Ancient Wales, showing that Bartrum conflated 2 men named Cynwrig in this family. Both had a son named Dafydd Llwyd. (Steven Ferry, October 29, 2023.)