Warren married Thelma A. Birkey on 25 Jul 1940 in Palmyra, Marion County, Missouri, USA. Thelma (daughter of Aaron A. Birkey and Tina A. Shanbeck) was born on 13 Jul 1919 in Groveland, Tazewell County, Illinois, USA; died on 24 Sep 2013 in Pekin, Tazewell County, Illinois, USA; was buried in Groveland Evangelical Mennonite Cemetery, Groveland Township, Tazewell County, Illinois, USA. [Group Sheet] [Family Chart]

1. David W. Hertenstein was born on 18 Mar 1941 in Morton, Tazewell County, Illinois, USA; died on 15 Mar 2008 in Kewanee, Henry County, Illinois, USA; was cremated in UNKNOWN.
2. Carol G. Hertenstein was born on 11 Dec 1943; died on 4 Aug 1981; was buried in Roberts Cemetery, Morton, Tazewell County, Illinois, USA.
3. Judy Hertenstein