On 5 Aug 1736 when Jacob was 21, he married Keziah Smith (32687) , daughter of Jacob Smith (15495) (29 Jan 1674/5-17 Jan 1738) & Rebecca Symonds (15828) (31 May 1679-), in Boxford, MA. Born on 30 Apr 1716 in Boxford, MA. Keziah died in Boxford, MA, on 23 Aug 1762; she was 46.

Keziah first married Jacob Baker, second Abner Hale as his second wife.