John married Catharina Mathilda Schmidt about 1883 in Ohio, USA. Catharina (daughter of Stephan Schmitt Schmidt and Katharina Mohrbacher) was born on 8 Nov 1868 in Salem, Washington County, Ohio, USA; died on 10 Nov 1944 in Lowell, Washington County, Ohio, USA; was buried in Good Hope Cemetery, Salem Township, Washington County, Ohio, USA. [Group Sheet] [Family Chart]

1. Elizabeth F. Grandstaff was born in 0Feb 1884 in Washington County, Ohio, USA; died in 0Jul 1944 in Ohio, USA.
2. Milton Earl Grandstaff was born on 8 Nov 1889 in Washington County, Ohio, USA; died on 14 Aug 1969 in Ohio, USA; was buried in Good Hope Cemetery, Salem Township, Washington County, Ohio, USA.
3. Essie May Grandstaff was born in 0Jun 1892 in Washington County, Ohio, USA; died in 1957 in Ohio, USA; was buried in Good Hope Cemetery, Salem Township, Washington County, Ohio, USA.