 A member of the famous Feuchtmayer family, he was the son of Michael Feuchtmayer (b.1667); the nephew of Franz Joseph Feuchtmayer (1660–1718) and Johann Michael Feuchtmayer (the Elder) (1666–1713); the older brother of Johann Michael Feuchtmayer (the Younger) (1709–1772); the cousin of Joseph Anton Feuchtmayer (1696–1770); and the father of Franz Xaver Feuchtmayer (the Younger) (b.1735).