He is married to Mary Andrews.
They got married on November 27, 1659 at Topsfield, Essex, Massachusetts, United States, he was 21 years old.Source 3
Child(ren):
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=39696549&pid=45/ Ancestry.com
Isaac Cummings; Male; Birth: 1633 Of, Topsfield, Essex, Massachusetts; Death: 1671; Baptism: 12 JUL 1932; Endowment: 13 JUL 1932; Sealing to Parents: 18 APR 1950 SLAKE; Isaac Cummings Sr. / Mrs Marie or Margaret Cummings; Father: Isaac Cummings Sr.; Mother: Mrs Marie or Margaret Cummings; Spouse: Mary Andrews; Marriage: 27 NOV 1659