Cahil Surname Meaning & Coat of Arms

Seen on a birth certificate or a ship's manifest, Cahil is usually a form of Cahill. At root, the name means “Descendant of Cathal ("strong in battle")”. Without the “l” of Cahill, Cahil is a simpler written form of the same name.

You may also find the name written O'Cahill and Cahell.

A coat of arms belongs to a particular family line rather than to everyone named Cahil, so the heraldry linked to Cahill is a starting point, not an automatic right. For the full story, order the Cahil surname pack.