Cynfyn ap Gwerystan was a notable figure in early medieval Wales, recognized as a prince of Gwynedd. He belonged to the lineage of the House of Aberffraw, which played a significant role in the history of Welsh royalty. His reign is often associated with the consolidation of power among Welsh rulers during a time of political fragmentation. Cynfyn is also known for his connections to the Llywelyn dynasty, which later became prominent in Welsh history. His descendants continued to influence the political landscape of Wales, contributing to the ongoing struggle for Welsh independence and identity against external forces, particularly the Normans.