Madoc or Madog was a legendary Welsh prince who allegedly discovered America in 1170. Madoc may also refer to: People People in Welsh history Madog Elfed (c. 600), a hero mentioned in the medieval Welsh poem Y Gododdin Madog ap Rhiryd (12th-century), prince of part of Powys Madog ap Maredudd (died 1160), the last prince of a united Kingdom of Powys Princes of Powys Fadog in north-east Wales: Madog ap Gruffydd Maelor, son of Madog ap Maredudd, prince 1191–1236 Madog II ap Gruffydd, Lord of Dinas Bran, son of Gruffydd II ap Madog, prince 1269–1277 Madog Crypl, grandson of Madog II ap Gruffydd, prince 1289–1304, sometimes known as Madog III Madog Fychan, probably son of Madog Crypl, prince 1304–c.1325 Madog ap Llywelyn (13th-century), prince of the Kingdom of Gwynedd Madoc ap Uthyr, a legendary figure, son of Uther Pendragon and brother of King Arthur Other people Philip Madoc (1934–2012), Welsh actor Ruth Madoc (1943–2022), British actress and singer Places Madoc, Ontario (township), a township in Canada Madoc, Ontario (village), a nearby village Madog River, in Guam Maen Madoc, a menhir (standing stone) in the Brecon Beacons, South Wales Other uses Madoc (poem), an 1805 poem by Robert Southey Madoc (Tijdschrift over de middeleeuwen), a Dutch journal of medieval studies See also Maedoc, the equivalent Irish name Maddock (disambiguation) Mad Dog (disambiguation) Prince Madoc (disambiguation) Welsh masculine given names