Jacob married Maria Elisabetha Probst about 1795 in Birkenhördt, Pfalz, Bayern. Maria (daughter of Johannes Probst and Dorothea Schiffler) was born on 29 Jul 1766 in Birkenhördt, Pfalz; was christened on 29 Jul 1766 in Birkenhördt, Pfalz; died on 3 Jan 1824 in Birkenhördt, Pfalz, Bayern. [Group Sheet] [Family Chart]

1. Johannes Lay was born on 31 Aug 1796 in Birkenhördt, Pfalz; was christened on 1 Sep 1796 in Birkenhördt, Pfalz; died on 1 Nov 1807 in Birkenhördt, Pfalz.
2. Georg Joseph Lay was born on 7 Feb 1799 in Birkenhördt, Pfalz; was christened on 7 Feb 1799 in Birkenhördt, Pfalz; died on 10 Jul 1838 in Birkenhördt, Pfalz, Bayern.
3. Margaretha Lay was born on 18 Mar 1805 in Birkenhördt, Pfalz; was christened on 18 Mar 1805 in Birkenhördt, Pfalz; died on 23 Aug 1830 in Birkenhördt, Pfalz, Bayern.