Narrative: It originated as a surname for Norman barons who invaded Ireland after the 1066 conquest of England. Spelled d'Arcy, it identified them as hailing from Arcy, in northern France.

This name may have converged over time with another surname derived from the Gaelic name O Dorchaidhe, meaning ''dark man.''

Narrative: It originated as a surname for some of the Norman barons who invaded Ireland after the conquest of England in 1066. Spelled d'Arcy, it identified them as hailing from a place in Northern France called Arcy.

This name may have converged over time with a surname derived from the Gaelic O Dorchaidhe, meaning ''dark man.''