Where Does the Cahy Surname Come From?

People called Cahy share their surname's story with Mulcahy, its better-known spelling. In origin, the name means “Descendant of the devotee of Cathach”.

Cahy and Mulcahy

Cahy is listed among the recognised spellings of Mulcahy. Before spelling was standardised, one family could appear under several forms. Related forms: Mulcahey and Mulchay.

Family crest and blazon

There is no single Cahy family crest for every bearer. Herald Lab researches the arms historically associated with the name and explains whose they were.

Want more than a summary? See the Cahy family name pack.