The will of John Stratton, Sr. of Easthampton, Suffolk County, dated 30 Aug 1684 mentions (among others): * sixthly, his grandchild Joseph Hand, who was a minor, and whose father was Stephen Hand. Joseph's mother was not mentioned, and is assumed to have been deceased. * eleventh, his grandchild Steven Hand
Find A Grave gives her first name as Sarah, with no evidence. I haven't seen a published source that gives her a first name.