legate (n.) Look up legate at Dictionary.com
mid-12c., "authorized representative of the Pope," from Old French legat and directly from Latin legatus "ambassador, envoy," originally "provided with a commission," past participle of legare "send as a deputy, send with a commission, bequeath," from lex (genitive legis) "contract, law" (see legal). General sense of "ambassador, delegate, messenger" is from late 14c.