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Dictionary of Medieval Names
from European Sources

Cormac m. Old Irish corbb, of uncertain origin, + Old Irish mac 'son'. OCM s.n. Corbb hypothesize that corbb is related to Old Irish corbbaid 'defiles', while others connect it with Latin corvus 'crow'.

The name of a mythological early Irish king and a 12th C king of Munster.

Scotland
Latin
1093x1107 Cormac (gen) ESC XIV; c1120 Cormacus (nom) ibid. XXXVI; 1124 Cormaco (abl) ibid. XLIX
Cite as: S.L. Uckelman. "Cormac". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Cormac.