Question: Were Esmeralda Ribeiro and Gruffydd Ap Rhys of the same nationality?
Sentence (from "Rhys ap Rhydderch"): By 1045, he and his brother had secured control of Morgannwg, and the native chronicles mention that in 1045 the two brothers performed some treacherous action against Gruffydd ap Llywelyn, the king of Gwynedd and Powys.
Relevant evidence: No