Ratigan

Ratigan is a surname. It is an anglicised form of the Irish patronym Ó Reachtágain, meaning "descendant of Reachtágain", whose name derives from the Old High German reht, meaning "justice". The name may vary as O'Raghtaghan, Raghtigan, Rhatigan, Rattigan, Rhategan, Ractigan and Ratican.