Robert ap Maredudd is the presumed Head of the House of Aberffraw following the death of Owain Lawgoch

Owain Lawgoch

Owain Lawgoch, , full name Owain ap Thomas ap Rhodri , was a Welsh soldier who served in Spain, France, Alsace and Switzerland. He led a Free Company fighting for the French against the English in the Hundred Years' War...

 the last and only known surviving great-nephew of Llywelyn ap Gruffydd

Llywelyn ap Gruffydd

Llywelyn ap Gruffydd may refer to:*Llywelyn the Last *Llywelyn ap Gruffydd Fychan...

 in 1378. He is cited by Sir John Wynn, 1st Baronet as his ancestor and head of the family at that time. He is known to have married a Welsh noble woman called Angharad ferch Dafydd ap Llywelyn. His full name showing his pedigree is Robert ap Maredudd ap Hywell ap Dafydd ap Gruffudd ap Caradog ap Thomas ap Rhodri ab Owain Gwynedd

Thomas ap Rhodri ab Owain Gwynedd

Tomas ap Rhodri ab Owain Gwynedd was the only known son of Rhodri ab Owain Gwynedd ruler of half Gwynedd from 1170–1195. In the 17th century, Sir John Wynn, 1st Baronet of Gwydir claimed and later proved his ancestor was Tomas ap Rhodri, however the Wynn family expired in the male line by the...

. He had a brother, Ieuan ap Maredudd, from whom the Anwyl of Tywyn family claim descent. A rival claim for the headship of the Aberffraw royal house would come at this time from the Price of Esgairweddan family descended illegitimately from Dafydd II.