Llywelyn Ddu "the Black" ap Gruffydd
- Born: Abt 1300
- Marriage (1): Margred verch Madog Fychan
Another name for Llywelyn was Llywelyn "the Black" ap Gruffydd.
RootsWeb - Celtic Royal Genealogy
Source: Collections Historical & Archaeological Relating to Montgomeryshire, and its Borders, Vol. XIII. (London, 1880), "The Tanat Pedigree", p. 122 - "Llewelyn Dd. 2nd son of Griffith. (The like.) = Marrett, dau. of Madoc Vaghan ap Madoc of Trevor (Party persinister, er. and erminois, a lion ramp. or.)
Llywelyn married Margred verch Madog Fychan, daughter of Madog Fychan ap Madog of Trevor and Unknown.