Death date given as no later than October 15, 1758 (burial date)
His son Carl Joseph Toeschi (1731—1788) was also a violinist in Mannheim and Munich.
His daughter Barbara Toeschi (1733–1763) married Innozenz Danzi, an Italian cellist, and their children included the composer Franz Danzi (1763—1826) and the singer-composer Franziska Lebrun (1756—1791).