On 17 Oct 1754 when Ephraim was 30, he married Ann Canfield (32171) , daughter of Thomas Canfield (5 Jan 1680/1-1 Dec 1760) & Mary Camp (14938) (21 Jan 1683/4-30 Jul 1740), in Durham, Strafford County, New Hampshire. Born ca 1728 in Milford, CT. Ann was baptized in First Church of Milford, on 26 Apr 1728.64