John married Martha Smith on 18 Sep 1895 in Hamilton County, Iowa, USA. Martha (daughter of Geerd J (George) Smith and Anna Brinkema) was born on 15 Sep 1876 in Grundy County, Iowa, USA; died in 1952 in Kamrar, Hamilton County, Iowa, USA. [Group Sheet] [Family Chart]

1. Anna S Havinga was born about 1896 in Iowa, USA.
2. Sarah M Havinga was born about 1897 in Iowa, USA.
3. Dena A Havinga was born about 1899 in Iowa, USA.
4. Marvin J Havinga was born about 1905 in Iowa, USA.
5. Bertha J Havinga was born about 1907 in Iowa, USA.
6. Emma G Havinga was born about 1908 in Iowa, USA.