Formby was born in the same house as his father, Marshall Formby, Sr. (1877–1957),<ref>{{cite web|url=http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=32028450|title=Marshall C. Formby|publisher=findagrave.com|accessdate=November 18, 2019}}</ref> a [[farmer]] and school board member in the Bethel community near [[rural]] Como in Hopkins County in East Texas. His mother was the former Rosa Mae Freeman (1882–1971).<ref name=plainview>{{cite web|url=https://plainviewtx.org/ArchiveCenter/ViewFile/Item/306|title=Marshall Formby|publisher=centennialcircleofhonorplainviewexas.com|accessdate=November 18, 2019}}</ref> | Formby was born in the same house as his father, Marshall Formby, Sr. (1877–1957),<ref>{{cite web|url=http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=32028450|title=Marshall C. Formby|publisher=findagrave.com|accessdate=November 18, 2019}}</ref> a [[farmer]] and school board member in the Bethel community near [[rural]] Como in Hopkins County in East Texas. His mother was the former Rosa Mae Freeman (1882–1971).<ref name=plainview>{{cite web|url=https://plainviewtx.org/ArchiveCenter/ViewFile/Item/306|title=Marshall Formby|publisher=centennialcircleofhonorplainviewexas.com|accessdate=November 18, 2019}}</ref> |