Thomas Adams was born about 1612 in Barton St. David, Somersetshire, England. He was the son of Henry Adams, also of Barton St. David (and later, Braintree, MA), and Edith Squire, the progenitors of the same Adams family that produced Presidents John Adams and John Quincy Adams.
Thomas came to America with his parents in 1638.
Based on the birth of his first child Mary born at Braintree, Massachusetts in July, 1643, he married his first wife, Mary (___) by 1642.  Her name is given as Mary in the births of their sons at Concord, Massachusetts. 
Thomas was active as a townsman in the Massachusetts Bay Colony. He was mentioned on May 10, 1643 as having been admitted as a Freeman. Thomas removed with his brothers Samuel and John from Braintree to Concord, Massachusetts in 1646. John then went to West Cambridge (now Arlington), and Thomas and Samuel settled in the west part of the town of Chelmsford in 1650-4. He was a landowner in Concord in 1646. Although there are no records regarding the building of the Town Meeting House, it was suggested that the bulk of expense was paid by Thomas and Samuel. In 1655, he became one of the founders of Chelmsford MA, where he held several town offices. In 1660-1671 he was a Selectmen in Chelmsford. Thomas was the deputy from Chelmsford to the Massachusetts General Court in 1673. He was appointed an Ensign in 1678, Lieutenant in May, 1682, of the Chelmsford Military Company.
He married Mary Blackmore/Blacknuden on April 28, 1680 in Chelmsford, Massachusetts. 
Thomas died in Chelmsford on July 20, 1688 at the age of seventy-six.
His will, written March 28, 1688, was proved on October 7, 1690. In it he names: 
sons Pelatiah, Timothy, Samuel and Jonathan Adams
daughter Mary Cooper
friends James Gildreth and Jacob Warren, overseers 
His estate inventory, taken on August 14, 1688, was assessed at L162, inlcuding the house, orchard and other lands being valued at L136. 
His wife Mary survived him, living until the 23rd of March 1694/5.
Thomas b 30 Sep 1660 Chelmsford, Massachusetts
Mary b 29 Oct 1664 Chelmsford, Massachusetts
A Genealogical History of Henry Adams lists two daughters, Rebecca And Elizabeth. They were instead daughters of Thomas Adams and Alice/Eales (Roper), born in Charlestown, Massachusetts. and there is no such record in Chelmsford.
Rebecca b 18 Sep 1657 Chelmsford, Massachusetts
Elizabeth b 21 Oct 1658/9 Chelmsford, Massachusetts
Thomas was chosen chief Sergeant of the military company in 1659, but the County Court refused to confirm him on account of his religious views. He was confirmed in April, 1660 upon solemnly agreeing not to disseminate his principles or notions contrary to what the church doth confessedly own and practice.
He was chosen Ensign in 1678, and Lieutenant in 1682, in the company of which his brother Samuel was Captain. He was Town Clerk, Selectman, Commissioner or Representative to the General Court. 
↑ 2.02.1 Records of Boston: Vital Records from The NEHGS Register, Volume 3: p. 126 Online database. AmericanAncestors.org. New England Historic Genealogical Society, 2014. (Compiled from articles originally published in The New England Historical and Genealogical Register.)
↑ Tolman, George compiler. Concord, Massachusetts Births, Marriages, and Deaths, 1635-1850, Printed by the Town, T. Todd Printer, Beacon Press, Boston, Massachusetts, 1891, p. 6
↑ Anderson, Robert Charles. The Great Migration (Boston: New England Historic Genealogical Society, 1999), 525.
↑ "Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (Massachusetts Town Records : accessed 29 March 2018), Thomas Adams, 20 Jul 1688; citing Death, Chelmsford, Middlesex, Massachusetts, United States, , town clerk offices, Massachusetts; FHL microfilm 892,249.
↑ Find A Grave, database and images (findagrave.com : accessed 29 March 2018), memorial page for LT Thomas Adams (25 Mar 1612–20 Jul 1688), Find A Grave: Memorial #39387590 ; Maintained by Harlene Soper-Brown (contributor 46880650) Unknown.
↑ 13.013.113.2 Case 245:p. 1-5: Middlesex County, MA: Probate File Papers, 1648-1871.Online database. AmericanAncestors.org. New England Historic Genealogical Society, 2014. (From records supplied by the Massachusetts Supreme Judicial Court Archives. Digitized images provided by FamilySearch.org)
↑ "Massachusetts Births and Christenings, 1639-1915," database, FamilySearch (Massachusetts Births : accessed 29 March 2018), Tho. Addams in entry for Jonathan Addams, 06 Mar 1646; citing CONCORD,MIDDLESEX,MASSACHUSETTS, ; FHL microfilm 0823762 IT 1.
↑ "Massachusetts Births and Christenings, 1639-1915," database, FamilySearch (Massachusetts Births : accessed 29 March 2018), Tho. Addams in entry for Pelatia Addams, 06 Mar 1646; citing CONCORD,MIDDLESEX,MASSACHUSETTS, ; FHL microfilm 0823762 IT 1.
↑ "Massachusetts Births and Christenings, 1639-1915," database, FamilySearch (Massachusetts Births : accessed 29 March 2018), Tho. Addams in entry for Timothy Addams, 15 Apr 1648; citing CONCORD,MIDDLESEX,MASSACHUSETTS, ; FHL microfilm 0823762 IT 1.
↑ "Massachusetts Births and Christenings, 1639-1915," database, FamilySearch (Massachusetts Births : accessed 29 March 2018), Tho. Addams in entry for George Addams, 29 May 1650; citing CONCORD,MIDDLESEX,MASSACHUSETTS, ; FHL microfilm 0823762 IT 1.
↑ "Massachusetts Deaths and Burials, 1795-1910," database, FamilySearch (Massachusetts Deaths : accessed 29 March 2018), Thomas Adams in entry for Thomas Adams, 30 Sep 1660; citing Chelmsford, Middlesex, Massachusetts, reference P 20; FHL microfilm 868,435.
It may be possible to confirm family relationships with Thomas by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: