Wilhelm married Mary Elizabeth Lentz on 2 Jan 1917 in Wilkes-Barre, Luzerne County, Pennsylvania, USA, and was divorced on 15 Jan 1921. Mary (daughter of Wilhelm Friedrich Lentz and Elizabeth Stoebener) was born on 15 Aug 1887 in Wilkes-Barre, Luzerne County, Pennsylvania, USA; died on 11 May 1934 in Detroit, Wayne County, Michigan, USA; was buried in Roseland Park Cemetery, Royal Oak, Oakland County, Michigan, USA. [Group Sheet] [Family Chart]

1. William Frederick Protz was born on 2 Feb 1918 in Milwaukee County, Wisconsin, USA; died on 14 Sep 1997 in Chatham County, Georgia, USA; was buried in Evergreen Cemetery, Manitowoc, Manitowoc County, Wisconsin, USA.
2. Robert Henry Protz was born on 28 Apr 1919 in Milwaukee, Milwaukee County, Wisconsin, USA; died on 3 Mar 1996 in Sarasota, Sarasota County, Florida, USA; was buried in Arlington National Cemetery, Arlington County, Virginia, USA.

Family/Spouse: Helen Kochman. Helen was born on 27 Jul 1887; died on 6 Mar 1975. [Group Sheet] [Family Chart]