See this site for a discussion of the probability of John Hawkes being a son of John Hawkes and Mary Cowper. DO NOT MERGE INTO JOHN HAWKES MARRIED TO MARY COWPER.
John Hawkes was born about 1613 based on the date he was admitted a Freeman. His parents and origins are unknown. He came to New England about 1634 and was first of Dorchester, Massachusetts, removing to Windsor, Connecticut in 1635. 
1634: September 3: Made a Freeman at Dorchester. 
1640: John Hawkes was listed among the Founders of Windsor, Connecticut. 
1640/1: February February 4: In the Windsor land inventory, John was noted to have 4 parcels including his home lot with 8 acres, meadow, upland, and swamp. 
1648/9: March 1: Served on the Connecticut petit jury. 
1649/50: February 6: Chosen as tax collection. 
On September 28, 1669, Robert and Elizabeth Hinsdale, the mother of the above children, indicated to the court their desire to set the housing and lands in Hadley of John Hawkes, deceased, except those given to John Hawkes Jr., as security for the children's portions above as the previous court in 1663 had not provided security. 
On September 27, 1681, widow Elizabeth Hinsdale, administrator for her late husband John Hawkes estate, presented the court with a petition indicating the children had been paid their portions, and that further, she had returned to Hadley to live. Her request was to have sons Eleazer and Gershom who 'are yet unmarried,' improve the remainder of the whole estate to provide her maintenance during her life, and at her death, the court 'appoint those lands' to Eleazer and Gershom. 
↑ The Connecticut Nutmegger, Connecticut Society of Genealogists, Glastonbury, Connecticut, Volume 16, 1983, p. 196 (Online database. AmericanAncestors.org. New England Historic Genealogical Society, 2009.)
↑ Williams, Alicia Crane. Thomas Dibble (m. 1637) in: Early New England Families, 1641-1700. (Original Online Database: AmericanAncestors.org, New England Historic Genealogical Society, 2013
Early New England Families, 1641-1700. (Original Online Database: AmericanAncestors.org, New England Historic Genealogical Society, 2013. (By Alicia Crane Williams, Lead Genealogist.) https://www.americanancestors.org/DB501/i/13723/1/0 (Subscription required)
Hinman, R. R. -"Catalogue of the Names of the First Puritan Settlers of the Colony of Connecticut, (1846)".
Judd, Sylvester-"History of Hadley, (1905)".
Savage, James-"Genealogical Dictionary of the First Settlers of New England, (1860)".
Sheldon, George-"History of Deerfield, Massachusetts," Vol. II (1896).
Stiles, Henry R., M.D.-"Genealogies and Biographies of Ancient Windsor (1891)".