He married Eva Maria Münnich, said to be the daughter of the later Russian Field Marshal Burkhard Christoph Count von Münnich (1683–1767), his predecessor as superintendent of the Saxon building authority. His son August von Jauch (b. 1731) was godson of King Augustus II the Strong. The elaborate cradle endowed to his parents by the king, later the cradle for Joachim Lelewel, is exhibited in the National Museum, Kraków. Joachim Daniel Jauch is buried in the Capuchins Church in the Miodowa in Warsaw.