Maelor Gawr is an early Celtic king and giant of Welsh folklore, who lived in Castell Maelor, Pen Dinas also known as (Dinas Maelor) in Penparcau, a village near Aberystwyth before the coming of Brutus to this island. The tale of Maelor and his three sons, Cornippyn, Crygyn and Bwba, is recorded in the late sixteenth century Welsh text Olion Cewri Cymru... (The Giants of Wales and their dwellings) by Sion Dafydd Rhys (with the antiquarian spelling Maylor Gawr).