Leonardus married Cornelia Kouwenhoven on 6 Feb 1785 in Delft. Cornelia was christened on 5 Sep 1765 in Nootdorp; died on 20 Oct 1859 in Delfgauw. [Group Sheet] [Family Chart]
Children:
3. Theodorus van der Helm was christened on 11 Apr 1790 in Delft; died on 28 Feb 1852 in Zegwaart.
Theodorus married Neeltje Groenewegen on 9 May 1818 in Biesland. Neeltje was christened on 3 Dec 1795 in Schipleuiden; died on 1 Jan 1822 in Delft. [Group Sheet] [Family Chart]
Children:
4. Leonardus van der Helm was born on 18 Feb 1819 in Delft; died on 20 Jun 1900 in Haarlemmermeer.
Leonardus married Alida Verbeij on 10 May 1844 in Hazerswoude. Alida was born on 2 Apr 1820 in Zoetermeer; died on 8 Apr 1891 in Haarlemmermeer. [Group Sheet] [Family Chart]
Children:
5. Cornelia van der Helm was born on 18 Mar 1862 in Haarlemmermeer; died on 18 Aug 1940 in Haarlemmermeer.