John married Louise Elizabeth Burkhart on 22 Sep 1909 in St. Paul's Church, Bloomer, Chippewa County, Wisconsin, USA. Louise (daughter of Gabriel Burkhard Burkhart and Magdalena Keller) was born on 9 Oct 1885 in Bloomer, Chippewa County, Wisconsin, USA; died on 13 Jun 1976 in Rice Lake, Barron County, Wisconsin, USA; was buried in St. Joseph's Cemetery, Rice Lake, Barron County, Wisconsin, USA. [Group Sheet] [Family Chart]

1. John B. Radtke was born on 7 Dec 1910 in Rice Lake, Barron County, Wisconsin, USA; died on 18 Oct 1981 in Muskegon, Muskegon County, Michigan, USA; was buried in Lake Forest Cemetery, Grand Haven, Ottawa County, Michigan, USA.
2. Mary Elinor Radtke was born on 8 Feb 1913 in Augusta, Eau Claire County, Wisconsin, USA; died on 30 Jan 2014 in Eau Claire, Eau Claire County, Wisconsin, USA; was buried in Sacred Heart Cemetery, Eau Claire, Eau Claire County, Wisconsin, USA.
3. William Gabriel Radtke was born on 11 Jun 1917 in Rice Lake, Barron County, Wisconsin, USA; died on 22 Jan 1991; was buried in Saint Mary's Cemetery, Muskegon, Muskegon County, Michigan, USA.
4. Mary Jane Radtke was born on 14 Feb 1923 in Rice Lake, Barron County, Wisconsin, USA; died on 17 Jan 2018 in Wauwatosa, Milwaukee County, Wisconsin, USA.
5. Joseph Peter Radtke was born on 10 Mar 1926 in Rice Lake, Barron County, Wisconsin, USA; died on 15 Oct 1998 in Muskegon, Muskegon County, Michigan, USA.

Johannes married Augusta Masgai on 20 Dec 1869 in St. Joseph's Church, Milwaukee, Milwaukee County, Wisconsin, USA. Augusta was born on 6 Aug 1838 in Schneidemühl, Posen, Westpreußen; died on 10 Mar 1907 in Augusta, Eau Claire County, Wisconsin, USA; was buried in Eastlawn Cemetery, Augusta, Eau Claire County, Wisconsin, USA. [Group Sheet] [Family Chart]