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Dictionary of Medieval Names
from European Sources

Madog m. A derivative of Old Breton, Middle Welsh mat 'good, fortunate'.

The name of a 6th-7th C Irish saint, a legendary 12th C Welsh explorer who purportedly reached America, two 12th C princes of Powys, and two 13th C princes of Powys.

In early Arthurian literature, Madoc is the name of a son of Uther and brother of Arthur.

Wales
Latin
1247 Madoco (abl) ArchCambIII p. 228, Madocus (nom) ibid. p. 228, madoci (gen) ibid. p. 228; 1360 Madoc (nom) ibid. p. 166; 1453 Madoc (nom) ibid. p. 69; 1454 Madoc (nom) ibid. p. 70; 1455 Madoc (nom) ibid. p. 72; 1456 Madoc (nom) ibid. p. 258; 1497 Madoc (nom) ibid. p. 66
1360 Madyn (nom) ArchCambIII p. 166; 1452 Madogyn (nom) ibid. p. 71; 1453 Madogyn (nom) ibid. p. 69
Cite as: S.L. Uckelman. "Madog". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 3. http://dmnes.org/2015/3/name/Madog.