Pamela:
These folks are referenced in many places:
The following is from:
Thomas Thacher 1620 - 1678, Boston Branch Progenitors and Descendents Volume Two by Elwood James Thacher 1978.
Susanna Thacher (6), born June 22, 1719, Middleboro, MA; married Samuel Tucker, born September 25, 1719, died May 27, 1776. Susanna Thacher died December___, 1748. Samuel Tucker married Elizabeth Heywood as his second wife; they had 5 sons and 3 daughters.
Children:
(1) Mary Tucker born May 22, 1745
(2) Susanna Tucker born October 12, 1747
(3) John Tucker born October 26, 1748
(Brief Summary)
Peter Thacher (5), October 16, 1688 - April 22, 1744
Peter Thacher (4), July 18, 1651 - December 27, 1727
Thomas Thacher (3), May 01, 1620 - October 15, 1678
Peter Thacher (2), 1587.8 - February 11.16, 1640.1
Peter Thacher(1), 1545.9 - 1624
Much more information here, see also the following references:
Thacher - Thatcher Genealogy by John R. Totten
Genealogy and Biographical Sketches, of the Descendents of Thomas and Anthony Thacher, From their Settlement in New England, June 4th, 1635 by D. W. Allen
Thacher Genealogy and Mayflower Ancestors by Alice Erma Thacher Sipe
Anthony Thacher, 1588 - 1667, Yarmouth Branch Descendents by Elwood James Thacher
Thacher (Thatcher). Descendents of Thomas and Anthony Thacher
Thacher, An Old Family by Sarah Elizabeth Washburn Heald
Thacher, The Thacher Family by Julia W. Redfield
Thacher , The Thacher Family in England by Peter Thacher
There are other references out there also.