Etymology tree
Proto-Indo-European *(s)meh₂-der.
Proto-Italic *manus
Latin manus
Latin manica
Old Galician-Portuguese manga
Portuguese manga
Inherited from Old Galician-Portuguese manga, from Latin manica, from manus, from Proto-Italic *manus, from Proto-Indo-European *(s)meh₂-.
Cognate with Spanish manga, French manche. Doublet of Mancha.