Gruffydd Fychan II ap Gruffydd ap Madog of Rhuddallt, Baron of Glyndyfrdwy

   Other names for Gruffydd were Gruffydd Fychan II Lord of Glyndyfrdwy & Cynllaith Owain, Griffith Fychan Lord of Glyndwrdwy, co. Merioneth, Griffith Vychan ap Griffith ap Kuddall and Gruffydd Vychan.

  Research Notes:

Baron of Glyndyfrdwy, Lord of Cynllaith Owain

Source: Ancestral Roots of Certain American Colonists Who Came to America before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr, ed. by William R. Beall & Kaleen E. Beall, Baltimore, 2008, Line 249-34 - Gruffydd Fychan ap Gruffydd, of Rhuddallt, Baron of Glyndyfrdwy, Lord of Cynllaith Owain

Wikipedia (Gruffydd Fychan II):

Gruffydd Fychan II was Lord of Glyndyfrdwy and Lord of Cynllaith Owain c.1330 -1369 . He was also the hereditary prince of Powys Fadog . His genealogy is uncertain and several tables convey conflicting data. It has been thought that he was the son of Madog Crypl who died in 1304 . However, for him to inherit the throne then and to rule until 1369 seems unlikely. Other tables suggest his father was Gruffydd ap Madog Fychan a son of Madog Fychan .
Gruffydd Fychan II was married to Elen daughter of Thomas ap Llwelyn, of Iscoed and had issue

Source: Collections Historical & Archaeological Relating to Montgomeryshire, and its Borders, Vol. XIII, Issued by the Powys-Land Club for the Use of Its Members, London, 1880, p. 123 has "Griffith Vychan ap Griffith ap Kuddall. (The like.)"

Gruffydd married Elen verch Thomas ap Llewellyn Owen, daughter of Thomas ap Llywelyn ap Owain of Iscoed Uch Hirwen, Cardiganshire and Eleanor ferch Philip ap Ifor. (Elen verch Thomas ap Llewellyn Owen was born about 1337.)