Gwenllian verch Griffith ap Adda of Dolgôch, Merionethshire ^{1 2}

  Research Notes:

Daughter and co-heiress of Gruffydd ap Adda ap Gruffydd of Dôl Goch.

From the book Reifsnyder-Gillam Ancestry, edited by Thomas Allen Glenn (Philadelphia, 1902), provided by http://books.google.com, p. 38:

"[Ednyfed ap Llewelyn] married Gwenllian, daughter and co-heiress of Griffith ap Adda ap Griffith, of Dolgôch, Merionethshire. Griffith ap Adda, of Dolgôth, was Raglor of the Comôt of Estimaner, at Michaelmas, 1333 (7 Edward III), and his tomb remains in the Church of Towyn."

Gwenllian married Ednyfed ap Llewelyn of Llangelynin, Merionethshire, son of Llewelyn "the Terrible" ap Tudor Lord of Talybont, Merionethshire and Unknown. (Ednyfed ap Llewelyn of Llangelynin, Merionethshire was born before 1343 and died in <Llangelynin, Talybont, Merionethshire, Wales>.)