Carrauntoohil is the most common and official spelling of the name, being the only version in use by Ordnance Survey Ireland, the Placenames Database of Ireland, and by Irish academic Paul Tempan, compiler of the Irish Hill and Mountain Names database (2010). Carrauntoohill has also been used in the past, for example by Irish historian Patrick Weston Joyce in 1870. Other less common spelling variations have included Carrantoohil, Carrantouhil, Carrauntouhil and Carrantuohill; all of which are anglicisations of the Irish placename.