Pius married Frances Agnes Swartzmiller on 3 May 1921. Frances (daughter of Joseph William Swartzmiller and Mary Magdalena Gosche) was born on 26 Jul 1900 in Seneca County, Ohio, USA; died on 26 Dec 1991 in Ohio, USA. [Group Sheet] [Family Chart]

1. Dorothy Mary Welter was born on 6 Aug 1923 in Toledo, Lucas County, Ohio, USA; died on 11 Jun 2001 in Perrysburg, Wood County, Ohio, USA; was buried on 15 Jun 2001 in Calvary Cemetery, Toledo, Lucas County, Ohio, USA.
2. Jane Frances Welter was born on 25 May 1926 in Ohio, USA; died on 10 Oct 2011 in California, USA.
3. Regina Ann Welter
4. Grace Kathryn Welter
5. Donald Joseph Welter
6. Thomas Arthur Francis Welter