From an Irish surname, an Anglicized form of Ó Cathasaigh meaning "descendent of Cathasach ". This name can be given in honour of Casey Jones (1863-1900), a train engineer who sacrificed his life to save his passengers. In his case, Casey was a nickname acquired because he was raised in the town of Cayce, Kentucky. Casey originates in Gaelic languages and means "alert, watchful". It was derived from an old Irish surname and as a surname it appears until today. Initially, it was used as a masculine given name but lately it is becoming more and more popular for girls as well.
