He married Juliana de Lacy; her ancestry is uncertain, but she may have been a daughter of Walter de Lacy.
Madog ap Maredudd | Maredudd ab Owain | Morgan ap Maredudd | Maredudd ap Cynan ab Owain Gwynedd | Llywelyn the Elder ap Maredudd ap Cynan ab Owain Gwynedd | John "Wynn" ap Maredudd |