Morgan m. Old Welsh, Old Breton, Cornish Morcant, from Proto-Celtic *mori 'sea' + an uncertain element.
The name of a few early Brythonic and Welsh kings.
Morgan & Morgan s.n. Morgan note two incorrect etymologies of the name which have led to interesting connections between Morgan and other names. They report an example of Seaborn which was "a name intended to translate Morgan", on account of a false etymology deriving the second element from geni 'to be born'. The name has also been connected to Pelagius, due to the meaning of the prototheme.