"Of the parentage of Tase Cooper, I have been able to find no trace. She had a brother John who lived in London in 1677 and in 1680, and also a brother Robert who writes from Yarmouth in 1644, highly praising New England as a place of residence. There were others of the same family name on the Connecticut River at this period, but none from Dorchester and none with whom she can be connected. From whatever source she came, she proved a noble woman and a faithful wife... As to her name in full, we can only conjecture. Mr. Hubbard appears to have written it Tase without exception; later writers have agreed upon Tacy."
Tacy (Tasy, Tase) Cooper came to Dorchester, Massachusetts, June 9, 1634 from England and was married to Samuel Hubbard when she was 28 years old. Samuel Hubbard came to Salem, Massachusetts in 1633 and married Tacy Cooper January 4, 1636 at Windsor, Connecticut by Mr. Ludlow. They were both in the party that marched through the wilderness from Watertown, Massachusetts, during the terrible winter of 1635 to become the founders of Connecticut. They were persecuted in Massachusetts for expressing their Baptist views. Samuel Hubbard finally in 1648 found refuge in Rhode Island where he was associated with Elder John Crandall and others in founding the colony of Rhode Island.
It is recorded that on 11 March 1667, Tacy Hubbard and a another woman were the first settlers in the Colonies to observe the Sabbath.
They were prominent members of the first Seventh Day Baptist church of Newport.
They had separated from the First Day Baptist church after they were called to account for absenting themselves from the "breaking of bread". 
Calculated from the memorial stone which states she was 79 years and 70 months old on 27 September 1688 (see below).
She is frequently found with a birth date of 12 February 1609, but the primary source to support this has not been found.
9 June 1634 immigrated at Dorchester, Massachusetts 
1635 (age 25) Both Samuel Hubbard and Tacy Cooper were in the party that marched through the wilderness from Watertown, Massachusetts during the terrible winter of 1635 to become the founders of Connecticut. They were persecuted in Massachusetts for expressing their Baptist views.
2-12 October 1648 moved from Fairfield, Connecticut, to Rhode Island after being threatened with imprisonment for their religious views 
"God having enlightened both, but mostly my wife, into his holy ordinances of baptizing only of visible believers, and being very zealous for it, she was mostly struck at and answered two terms publicly, where I was also said to be as bad as she, and sore threatened with imprisonment to Hartford jail, if not to renounce it or to remove; that scripture came into our mouths, if they persecute you in one place, flee to another; and so we did 2 day of October, 1648, we went for Rhode Island."
3 November 1648 baptized into the Seventh Day Baptist Church, Newport, RI 
after 1697 died probably in Westerly
"[Samuel Hubbard's] wife survived him, and was present at a meeting in 1697, after which no trace of her can be found."
Burial: Baptist Berkly's, White Hall, Farm, England
Children of Samuel and Tacy (Cooper) Hubbard: 
Naomi, b. Nov. 18, 1637 at Wethersfield; d. Nov. 28 1637 at Wethersfield.
Naomi, b. Oct. 19, 1638 at Wethersfield; d. May 5, 1643, Springfield.
Ruth Hubbard, b. Jan. 11, 1640, Springfield; d. about 1691, Westerly; m. Nov. 2, 1655, Robert Burdick, b. - -, d. 1692. Children: 1. Robert, 2. Son, 3. Hubbard, 4. Thomas, 5. Naomi, 6. Ruth, 7. Benjamin, 8. Samuel, 9. Tacy, 10. Deborah.
Rachel Hubbard, b. Mar. 10, 1642, Springfield, d. --; m. Nov. 3, 1658, Andrew Langworthy. Children: 1. Samuel, 2. James
Samuel, b. Nov. 30, 1649, Newport; d. Jan. 20, 1670/1, Newport
From an article in the Literary Diary of Ezra Stiles, President of Yale University, there is a copy of an old memorial stone which reads:
Samuel Hubbard aged 10 of May 78 yeres
Ould Tase Hubbard aged 27 Sep. 79 yeres and 7 mons
4 Jen. maryed 51 yeres 1688
14V psal 4. God have given us 7 children 4 ded 3 living
Ruth Burdick 11, 1 ded 10 living
Rachel Langworthy had 10 children 3 ded 7 living
Bethiah Clark 9 living
Great Grandchildren BNaomi Rogers 1 ded 4 alyfe BRuth Philips 1 ded 4 alyfe CJudah Maxon
(The term Ebenezer means a memorial stone set up to commemorate divine assistance such as that found in 1 Samuel 7:12 when Samuel took a stone and set it up after a victory over the Philistines, saying "Hitherto the Lord has helped us.")
A further note from the Stiles Diary explains: "I took this inscription off a gravestone in a family burying place on Baptist Berkeley's White Hall farm on Rd Isld, about A.D. 1763. Collector Robinson bought the lease about 1765 and demolished the gravestones and put them into a wall: so all is lost." He interpreted this to mean that the stone was erected on September 27, 1688 when Samuel was 79 years old on May 10, Tacy was 79 years and 7 months old, and that they had been married for 51 years on January 4 of that year. The Psalm reference was Psalm 145:4 which reads, "One generation shall praise thy works to another." The superscript letters with Naomi, Ruth and Judah shows lineal decent from Burdick and Clark.
↑ 5.05.15.2 Cutter, William Richard. New England Families, Genealogical and Memorial, Volume 1. New England: Lewis Historical publishing Company, 1913. Page 461.
↑ Austin, John Osborne. Genealogical Dictionary of Rhode Island comprising three generations of settlers who came before 1690 : with many families carried to the fourth generation. Albany, NY: J. Munsell's Sons, 1887. Page 106-107.
It may be possible to confirm family relationships with Tacy by comparing test results with other carriers of her mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line: