Joannes Gielens
- Born: 12 Aug 1723, Meerbeek, , Brabant, Belgium
- Marriage (1): Maria Elisabetha Boisschot on 19 Jul 1757 in Duisburg, , Brabant, Belgium
- Died: 31 Dec 1804, Erps-Kwerps, , Brabant, Belgium at age 81
Joannes married Maria Elisabetha Boisschot, daughter of Cornelius Boisschot and Joanna de Raeymaecker, on 19 Jul 1757 in Duisburg, , Brabant, Belgium. (Maria Elisabetha Boisschot was born on 28 Feb 1737 in Duisburg, , Brabant, Belgium and died on 9 Jan 1815 in Erps-Kwerps, , Brabant, Belgium.)
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