Madoc is a variation of the Welsh name Madog.

The name means fortunate, lucky, and also good. The name is connected to well-wishes for a baby's lifetime voyage. Madoc may also refer to:

• 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
• Madog ap Owain Gwynedd (c. 1170), a legendary Welsh prince who allegedly discovered America in 1170.
• 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

• Philip Madoc (1934–2012), Welsh actor
• Ruth Madoc (1943–2022), British actress and singer

• 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

• Madoc (poem), an 1805 poem by Robert Southey
• Madoc (Tijdschrift over de middeleeuwen), a Dutch journal of medieval studies

• Maedoc, the equivalent Irish name
• Maddock (disambiguation)
• Mad Dog (disambiguation)
• Prince Madoc (disambiguation)
• All pages with titles containing Madoc
• All pages with titles containing Madog

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