On 2 Aug 1744 when Mary was 20, she first married Derick Van Horn, son of Christian Van Horn (ca 1683-10 Jun 1765) & Hannah Jones (ca 1685-1756). Born on 22 Jun 1721 in Springfield, Hampden County, Massachusetts. Derick died in West Springfield, Hampden County, Massachusetts, on 27 May 1752; he was 30.

On 29 Aug 1753 when Mary was 29, she second married Jesse Warner (29672) , son of Samuel Warner (12739) (13 Apr 1680-1746) & Hannah Sackett (Jun 1692-bef Oct 1731).294 Born on 6 May 1716 in Hatfield, Hampshire County, Massachusetts.294 Jesse died in Hinsdale, Berkshire County, Massachusetts, on 10 May 1793; he was 77.294

Jesse first married Miriam Smith, second Mary (Cooley) Van Horn, widow of Derick Van Horn.