William married Mary J. Zwergel on 28 Jun 1916 in Pittsburgh, Allegheny County, Pennsylvania, USA. Mary (daughter of Johannes Zwergel and Katharina Seibel) was born in 1890 in Pittsburgh, Allegheny County, Pennsylvania, USA; died in 1967 in Pennsylvania, USA. [Group Sheet] [Family Chart]

1. Edward J. Kraft was born on 20 Mar 1917 in Pennsylvania, USA; died on 3 Sep 2001 in Pittsburgh, Allegheny County, Pennsylvania, USA.
2. Andrew W. Kraft was born on 5 Jul 1918 in Pennsylvania, USA; died in 0Apr 1974 in Pennsylvania, USA.
3. Dorothy Marie Kraft was born on 19 Apr 1925 in Pennsylvania, USA; died on 15 Oct 1987 in Houston, Harris County, Texas, USA; was buried in Brownsdale Cemetery, Penn Township, Butler County, Pennsylvania, USA.