The House of Gwynedd is the royal house of the Kingdom of Gwynedd, in medieval Wales. It is divided between the House of Cunedda and the House of Aberffraw, and lasted from c.401 to 1283.

The House of Aberffraw was a medieval royal court based in the village it was named after, Aberffraw, Anglesey within the borders of the then Kingdom of Gwynedd. The dynasty was founded in the 9th century by a King in Wales whose descendants founded the Welsh Royal Houses. The other medieval Welsh dynasties were the Royal Houses of Dinefwr, Mathrafal.