What is another word for "proxy"?

Roget's Thesaurus (1911) lists these synonyms for "proxy": ablegate, accredit, acting, alter, answer, appear, archon, behalf, brief, champion, chancellor, commissioner, consul, delegate, deputy, director, ego, eight, eleven, for, friend, governor, hold, lieutenant, minister, next, plenipotentiary, prefect, premier, proconsul, provost, regal, regent, represent, representative, secondary, stand, stead, substitute, surrogate.