Arthur married Mary Catherine Sudmoeller on 19 Jun 1917 in Delphos, Allen County, Ohio, USA. Mary (daughter of John David Sudmoeller and Mary Elizabeth Hotz) was born on 19 Nov 1886; died on 16 Dec 1931; was buried in Saint John's Catholic Cemetery, Delphos, Allen County, Ohio, USA. [Group Sheet] [Family Chart]

1. Elmer Clarence Auer was born on 11 Apr 1918 in Delphos, Allen County, Ohio, USA; died on 23 Apr 1992.
2. Beatrice Augusta Auer was born on 4 Apr 1921 in Van Wert County, Ohio, USA; died on 1 Aug 1997 in Coldwater, Branch County, Michigan, USA; was buried in Memorial Park Cemetery and Mausoleum, Lima, Allen County, Ohio, USA.
3. John A. Auer was born on 4 Jul 1927 in Ohio, USA; died on 11 Nov 2019; was buried on 18 Nov 2019 in Guardian Angels Cemetery, Mount Washington, Hamilton County, Ohio, USA.