Maecenas, abettor, admirer, advocate, aficionado, angel, apologist, approver, backer, buff, certifier, champion, confirmer, cosignatory, cosigner, defender, dependence, encourager, exponent, fan, favorer, friend at court, guarantor, insurer, lover, mainstay, maintainer, notary, notary public, paranymph, partisan, party, patron, promoter, protagonist, ratifier, reliance, second, seconder, sectary, sider, signatory, sponsor, stalwart, standby, subscriber, support, supporter, sustainer, sympathizer, underwriter, upholder, votary, well-wisher