He is married to (Not public).
They got married in the year 1957 at Spangler, Cambria Co, Pennsylvania, USA, he was 19 years old.
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=2144139&pid=182/ Ancestry.com
Name: John E. Demi Birth Date: 12 Dec 1937 Birth Place: Death Date: 13 Aug 2006 Death Place: Ashville, Cambria, Pennsylvania/ Ancestry.com
Birth date: 12 Dec 1937 Birth place: Residence date: 1995 Residence place: Ashville, PA/ Ancestry.com
Birth date: abt 1938 Birth place: Death date: Abt 2006 Death place: Ashville PA/ Ancestry.com
Birth date: 12 Dec 1936 Birth place: Residence date: 1935-1993 Residence place: Ashville, PA/ Ancestry.com
Birth date: abt 1938 Birth place: Pennsylvania Residence date: 1 Apr 1940 Residence place: Spangler, Cambria, Pennsylvania, United States/ Ancestry.com