Joseph married Maria Eva Messemer on 21 Jun 1731 in Fischbach bei Dahn, Pfalz. Maria was born in 1699 in Wolfisheim, Bas-Rhin, Alsace, France; died on 22 Mar 1769 in Schönau, Pfalz. [Group Sheet] [Family Chart]

1. Maria Katharina Gräb was born in 1732 in Schönau, Pfalz; died on 23 Mar 1776 in Schönau, Pfalz.
2. Johannes Philipp Gräb was born on 1 Sep 1733 in Schönau, Pfalz; died in 1781 in Schönau, Pfalz.
3. Johannes Adam Gräb was born on 8 Jan 1736 in Schönau, Pfalz; died on 15 May 1782 in Niederschlettenbach, Pfalz.
4. Maria Barbara Gräb was born on 1 Feb 1741 in Schönau, Pfalz; died on 12 Aug 1780 in Schwanheim, Pfalz.
5. Johannes Friedrich Gräb was born on 2 Sep 1743 in Schönau, Pfalz; died on 28 Sep 1808 in Schönau, Pfalz.
6. Joseph Gräb was born in in Schönau, Pfalz.