Johannes married Katharina Barbara Arnold on 23 May 1775 in Gossersweiler, Pfalz, Bayern. Katharina (daughter of Georg Friedrich Arnold and Rosina Walter) was born on 3 Sep 1747 in Silz, Pfalz, Bayern; died on 19 Oct 1828 in Silz, Pfalz, Bayern; was buried on 21 Oct 1828 in Silz, Pfalz, Bayern. [Group Sheet] [Family Chart]

1. Matthias Allmann was born on 13 Mar 1776 in Gossersweiler, Pfalz; was christened on 14 Mar 1776 in Gossersweiler, Pfalz.
2. Franz Joseph Allmann was born on 2 Sep 1779 in Gossersweiler, Pfalz, Bayern; was christened on 3 Sep 1779 in Gossersweiler, Pfalz, Bayern; died on 8 Jan 1855 in Silz, Pfalz, Bayern; was buried on 10 Jan 1855 in Silz, Pfalz, Bayern.
3. Maria Anna Allmann was born on 12 Oct 1785 in Silz, Pfalz; was christened on 13 Oct 1785 in Silz, Pfalz; died on 24 Feb 1844 in Silz, Pfalz, Bayern; was buried on 26 Feb 1844 in Silz, Pfalz, Bayern.
4. Anna Maria Allmann was born on 4 Dec 1788 in Silz, Pfalz; was christened on 5 Dec 1788 in Stein, Pfalz; died on 20 Feb 1835 in Silz, Pfalz, Bayern.