Cahill (local /ˈkɑːhɪl/ , UK /ˈkɑːhɪl/ or /ˈkeɪhɪl/) is a name of Irish origin. In Irish, It is the anglicized version of the Gaelic O ó cathail meaning descendant Of .. cathalhis page or section lists people with the surname Cahill. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name (s) to the link.