Klaas married Catharina Wilhelmina Wessels on 29 Jan 1815 in Nieuwendam. Catharina was born on 29 Aug 1789 in Ilpendam; died on 19 Feb 1873 in Edam. [Group Sheet] [Family Chart]

1. Hendrik Dekker was born about 1815; died about 1815.
2. Poulus Dekker was born about 1818; died about 1883.
3. Hendrik Dekker was born about 1820; died about 1899.
4. Maria Dekker was born about 1821; died about 1873.
5. Gerrit Dekker was born about 1823; died about 1899.
6. Johannes Dekker was born about 1825; died about 1920.
7. Albertus Dekker was born on 20 May 1827 in Schellingwoude; died on 29 Apr 1907 in Alkmaar.
8. Maria Dekker was born about 1828; died about 1828.
9. Maria Catharina Dekker was born about 1829; died about 1872.
10. Catharina Dekker was born about 1830; died about 1900.
11. Nicolaas Andreas Dekker was born about 1833; died about 1882.