Jakob married Katharina Braun on 25 Nov 1867 in Weiler, Pfalz, Bayern. Katharina (daughter of Johannes Braun and Magdalena Gassmann) was born on 10 Feb 1845 in Kapsweyer, Pfalz, Bayern. [Group Sheet] [Family Chart]

1. Ludwig Stephan Backenstrass was born on 26 Dec 1861 in Weiler, Bas-Rhin, Alsace, France.
2. Bernhard Backenstrass was born on 20 Aug 1873 in Kapsweyer, Pfalz, Bayern; died on 30 Aug 1873 in Kapsweyer, Pfalz, Bayern.
3. Maria Margaretha Magdalena Backenstraß was born on 18 Sep 1875 in Kapsweyer, Pfalz, Bayern; died in 1957 in Steinfeld, Landkreis Südliche Weinstraße, Rheinland-Pfalz; was buried in Friedhof Steinfeld, Steinfeld, Landkreis Südliche Weinstraße, Rheinland-Pfalz.
4. Franz Backenstrass was born on 15 Jan 1880 in Kapsweyer, Pfalz, Bayern; died on 5 May 1880 in Kapsweyer, Pfalz, Bayern.
5. Katharina Backenstrass was born on 14 Jul 1881 in Kapsweyer, Pfalz, Bayern.