Jean married Eve Marguerite Schmitt on 30 Jan 1736. Eve (daughter of Mathieu Schmitt and Anne Marie Catherine Bley) was born on 7 Jul 1715 in Wingen, Bas-Rhin, Alsace, France; died on 29 Sep 1736 in Wingen, Bas-Rhin, Alsace, France. [Group Sheet] [Family Chart]

Jean married Katharina Lauer in Aug 1737. Katharina was born in 1716. [Group Sheet] [Family Chart]

1. Sebastian Loser was born in 1741 in Wingen, Bas-Rhin, Alsace, France.

Jean married Maria Margaretha Pfeifenberger on 27 Jan 1755 in Hauenstein, Pfalz, Bayern. Maria was born in 1712 in Hauenstein, Pfalz; died on 18 Apr 1782 in Hauenstein, Pfalz. [Group Sheet] [Family Chart]

1. Johannes Peter Loser was born on 10 Nov 1755 in Hauenstein, Pfalz, Bayern; died on 29 Nov 1784 in Hauenstein, Pfalz, Bayern.
2. Maria Margaretha Loser was born on 10 Aug 1757 in Hauenstein, Pfalz, Bayern; died on 4 Jan 1810 in Hauenstein, Pfalz, Bayern.
3. Johannes Adam Loser was born on 26 Nov 1763 in Hauenstein, Pfalz, Bayern; died on 26 Oct 1825 in Hauenstein, Pfalz, Bayern.