Robert E. Howard used the name "Cimmerians" for the people from whom his most well-known character, Conan the Barbarian, is descended. The people depicted in the Conan books have a quasi-Irish culture (for example, "Conan" is an Old Irish name), and are depicted as being the legendary ancestors of both the Gaels of Ireland and Scotland and the historic Cimmerians of the Black Sea. So would it be a safe bet using Gaelic or Celtic as Cimmerian in RP?