Caim is a Gaelic rendering of biblical 'Cain', who appears in a variation of the fantastical pedigree of Dardanus of Troy that is spun out in Lebor Bretnach, the Middle Irish language recension of the compilation called Historia Brittonum, known in the 9th century version by Nennius. Dardain m. Ioib m. Sadoirn m.