Synonyms for Doppelganger

Selfsame
carbon copy dead ringer ditto	Doppelganger duplicate facsimile	homonym replica same	selfsame spitting image synonym

Proxy
advocate agency alter ego alternate alternative amicus curiae analogy attorney backup barrister changeling clone comparison copyright	counterfeit deputy Doppelganger duplication equal equivalent ersatz exchange executive officer exponent fake figurehead ghost	imitation lieutenant makeshift metaphor paranymph personnel pinch hitter pleader procurator proxy replacement representative reproduction	reserves ringer second string secondary sub substitute substitution surrogate symbol third string understudy vicar vice