Meaning

originUncertain. The island name, from Latin Colosus (704 AD), is often associated with an Old Irish *koll or Proto-Brythonic *koll, themselves both from Proto-Celtic *koslos (“hazel”). Derivation from Ancient Greek κολοσσός (kolossós, “giant figure”) has been called "naïve" by Coates (2006).

Etymology from Wiktionary, CC BY-SA 3.0