Robert married Elizabeth S. Davis on 24 Mar 1880 in Hamilton County, Tennessee. Elizabeth (daughter of John Davis and Catherine) was born in 1862 in Wales; died on 8 Oct 1935 in Chattanooga, Hamilton County, Tennessee; was buried on 9 Oct 1935 in Forest Hills Cemetery, Chattanooga, Hamilton County, Tennessee. [Group Sheet] [Family Chart]

1. Catherine S. Orr was born in in Hamilton County, Tennessee.
2. Elizabeth Mae Orr was born on 2 Oct 1882 in Hamilton County, Tennessee; died on 23 May 1951 in Chattanooga, Hamilton County, Tennessee; was buried on 24 May 1951 in Forest Hills Cemetery, Chattanooga, Hamilton County, Tennessee.
3. Alice Gertrude Orr was born in in Hamilton County, Tennessee; died on 12 Mar 1891 in Chattanooga, Hamilton County, Tennessee; was buried in Forest Hills Cemetery, Chattanooga, Hamilton County, Tennessee.
4. Robert Thomas Orr was born on 27 Oct 1892 in Hamilton County, Tennessee; died on 4 Dec 1977 in Rutherford County, Tennessee; was buried in Forest Hills Cemetery, Chattanooga, Hamilton County, Tennessee.