*ner- (2) Look up *ner- (2) at Dictionary.com
Proto-Indo-European root meaning "man," also "vigorous, vital, strong."

It forms all or part of: Alexander; Andrew; andro-; androgynous; android; Andromache; Andromeda; anthropo-; anthropocentric; anthropology; anthropomorphous; Leander; lycanthropy; misanthrope; pachysandra; philander; philanthropy.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit nar-, Armenian ayr, Welsh ner "a man;" Greek aner (genitive andros) "a man, a male" (as opposed to a woman, a youth, or a god).