1a.  Royal Ralph Hinman.  1846.  A Catalogue of the Names of the First Puritan Settlers of the Colony of Connecticut.  E. Gleason, Hartford, CT. (online at Ancestry.com):

A Part of the Early Marriages, Births, and Baptisms, in Hartford, Ct., from Record... Hopkins, Ebenezer, m. Mary Butlear, of Wethersfield, dau. of Samuel, Jan. 21, 1691.

1b.  William Montgomery Clemens, ed.  1916.  Early Marriage Records of the Hopkins Family in the United States.  Self-published, New York, NY (compiled from original sources; online at Ancestry.com):

Ebenezer Hopkins

Mary Butler

21 Jan 1691

Hartford, Conn.

2.  Timothy Hopkins.  1932.  John Hopkins of Cambridge, Massachusetts, 1634, and Some of His Descendants.  Stanford Univ. Press, Stanford, CA.  On p. 23:

Ebenezer received under his father's will the 'dwelling house and home lotts' in Hartford, and was admitted into the First Church 24 April 1698 (Church Records).  His widow and sons Stephen, Isaac, and Ebenezer were among the new settlers at Waterbury in 1729. (Anderson's Waterbury 1: 301.)  His widow Mary and his brother Joseph were granted administration upon his estate 19 December 1711 and it was distributed 4 April 1721.  (Hartford Probate Records, 8: 115.) Inventory £433-15-18.

3.  Gary Boyd Roberts.  1995.  Ancestors of American Presidents.  New England Historic Genealogical Society, Boston, pp. 25-26, 240.

4.  Lucius M. Boltwod.  1859.  "Births, Marriages, and Deaths, from Book Lettered 'Records of Town of Hartford, 1685-1709, No. I'."  New England Historical and Genealogical Register 13(2): 141-148, 13(3): 239-244, 13(4): 343-346.

13(2): 143	Isaac Hopkins son of Ebenz Hopkins was born Novembr 25th 1708.
13(3): 241	Ebenezer Hopkins son of Eben. Hopkins & his wife Mar was born Nov. 16, 1693. Died Nov. 29 16[  ]. Jonathan was Born June 23, 169[ Ebenr his son was Born June 24. Hezekiah      was Born Novr 21, 170[ ] Mary          was Born Jan 30th 170[3?] Stephen       was Born August 17th 1706.
13(4): 344	Ebenezer Hopkins was married to Mary Butler Daughter of Saml Butler of Weathersfield Janry 21, 1691.

5.  Judd, Sylvester.  1851.  "Ancestors of Rev. Samuel Hopkins, D.D., of Newport, and Their Children."  New England Historical and Genealogical Register 5(1): 43-45.

p. 43

STEPHEN HOPKINS, only son of John, married Dorcas Bronson, daughter of John Bronson, of Farmington, and resided at Hartford.  He died in 1689, and his widow in 1697.  He names, in his will, six (sic) children, viz.: John, Stephen, Ebenezer, Joseph, Dorcas, Webster, and Mary Hopkins.