You mention wills - does that include Isaac Livermore of Wethersfield, draper, 1730. He mentions a Thomas Livermore of Wethersfield, innkeeper and his son Isaac. There is a baptism of an Isaac in Halsted to Thomas and Mary around 1717.
Is there anything interesting in the marriage bonds? Isaac to Helen Smith 1747, Isaac to Ann Yeldon 1751 and finally John Livermore to Susan Hubbard 1760.