Type Word Usage Old Irish Meaning & History Old Irish word meaning "to love" [1]. Related ItemsFamily Tree·Details Other Languages & Cultureskareti(Old Celtic) caru(Old Welsh) Given Name DescendantCarthach(Old Irish) Surname DescendantsMac Cárthaigh, MacCarthy, McCarthy(Irish) Sources & References Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 191.