"Windows Into Our Past The Longhunters, Volume 3", compiled by Judy Parsons Smith 2001.

Seisyll Ap Ednywain

Seisyll Ap Ednywain , m. to Prawst Verch Elise .  Seisyll & Prawst (Verch Elise) Ap Ednywain had:

Llywelyn Ap Seisyllt

Llywelyn Ap Seisyllt , son of Seisyll & Prawst (Verch Elise) Ap Ednywain, b. 980, Rhuddlan, Flintshire, Wales; d. 1021/1023; m. to Angharad Verch Maredydd , daughter of Maredydd Ap Owain , b. ca. 982, Deheubarth, Wales.  Llywelyn & Angharad (Verch Maredydd) Ap Seisyllt had:

Gruffydd Ap Llewelyn

Gruffydd Ap Llewelyn , son of Llywelyn & Angharad (Verch Maredydd) Ap Seisyllt, b. ca. 1011, Rhuddlan, Flintshire, Wales; d. 5 Aug 1063.