出典:Wiktionary
From Middle English Charlewayn, from 古期英語 carles wǣn, apparently from a common Proto-Germanic *karlas wagnaz (cognate with forms in other Germanic languages). It seems that this common Germanic name originally meant the ‘peasant's wagon’ (the churls' wagon) in contrast to the ‘woman's wagon’ (Ursa Minor). Later it was interpreted as ‘Charles's wagon’ and associated with Charlemagne.