mid-15c., "one to whom any return is due or payable, one to whom money is owed," from Anglo-French creditour, Old French creditor (early 14c.), from Latin creditor "truster; lender," from creditus, past participle of credere "to believe" (see credo).
"person to whom a privilege or concession has been granted," 1848, from French concessionaire "person to whom a concession has been granted," from concession, from Latin concessionem "an allowing" (see concession). Native form concessionary is attested from 1854; American English concessioner is from 1899.
"person to whom a mandate has been given, one who receives a command or charge," 1610s, from Late Latin mandatarius "one to whom a charge or commission has been given," from Latin mandatus, past participle of mandare "to order, commit to one's charge" (see mandate (n.)).