O'Casey: Last Name Origin and Family Crest

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

The meaning behind O'Casey

O'Casey sits within the Casey family of names, which has Irish roots. Taken at its root, O'Casey points to “Descendant of Cathasach ("vigilant")”.

A variant of Casey

With its O' prefix, O'Casey keeps Casey intact and marks descent in the older style. You may also find the name written Cassey and MacCasey.

Research your O'Casey family history with a full surname report and painted coat of arms.