Albert married Johanna Grootjen on 31 May 1894 in Kampen. Johanna (daughter of Cornelis Grootjen and Maria de Boer) was born on 29 Sep 1868 in Kampen; died on 17 Jun 1914 in Kampen. [Group Sheet] [Family Chart]

1. Hermanus Koek was born on 22 Jun 1895 in Kampen; died on 22 Sep 1979 in Kampen.
2. Maria Koek was born on 14 Mar 1897 in Kampen; died on 14 Jul 1945 in Kampen; was buried on 18 Jul 1945 in IJsselmuiden.
3. Geertruida Koek was born on 23 Feb 1899 in Kampen; died on 29 Sep 1900 in Kampen.
4. Klasina Koek was born on 26 May 1900 in Kampen; died on 16 May 1912 in Kampen.
5. Geertruida Koek was born on 27 Feb 1902 in Kampen; died on 20 Feb 1908 in Kampen.
6. Wilhelmina Koek was born on 14 Oct 1903 in Kampen; died on 11 Jun 1921 in Kampen.
7. Margaretha Koek was born on 30 Oct 1905 in Kampen; died on 5 Jan 1982 in Hellendoorn.
8. Cornelis Koek was born on 14 Jun 1907 in Kampen; died on 4 Feb 1946 in Kampen.
9. Geertruida Koek was born on 29 Jan 1909 in Kampen; died on 16 Aug 1999 in Kampen.