 He was the brother of Franz Joseph Feuchtmayer (1660–1718) and Michael Feuchtmayer (b.1667); the uncle of Joseph Anton Feuchtmayer (1696–1770), Franz Xaver Feuchtmayer (the Elder) (1705–1764), and Johann Michael Feuchtmayer (the Younger) (1709–1772); and the great-uncle of Franz Xaver Feuchtmayer (the Younger) (b.1735).