Etymology of the French word pseudonyme
the French word pseudonyme
derived from the Greek word pseudonumos, ψευδώνυμος (untruly named)
derived from the Greek word onoma, ὄνομα (a 'name' (authority, character))
derived from the Proto-Indo-European root *nō-men-
using the Greek prefix pseudo-, ψεῦδο-, ψευδο-