Machado & Maçedo are two different surnames. Both are Portuguese surnames. Machado is derived from ‘hammer’ and Maçedo from ‘apple orchards’. The rest all corrupted versions depend on each one’s imaginations, like Ferns, Rod, etc.
Origin of lastname Machado, country of origin: Spain http://heraldrysinstitute.com/cognomi_italiani.php?cognome=Machado&paese=Spain&goto=Origine_dei_Cognomi Origin of lastname Macedo, country of origin: Spain http://heraldrysinstitute.com/cognomi_italiani.php?paese=Spain&lang=en&cognome=Macedo#610499 Dr. Ferdinando dos Reis Falcão.