Heyman was born at Selling, Kent, the son of Sir Peter Heyman, MP for Hythe 1621-1622, and his wife Sarah Collett, daughter of Peter Collett merchant of London. He was admitted to Gray's Inn in 1626.
In April 1640, Heyman was elected Member of Parliament for Hythe in the Short Parliament. He was re-elected in November 1640 for the Long Parliament. Heyman was created Baronet of Somerfield in the County of Kent in the Baronetage of England on 12 August 1641.
Heyman died at the age of 47 at his seat, at Somerfield and was buried in the family vault, at Selling, in Kent.
Heyman married Mary Holford, daughter of Daniel Holford, of West Thurrock, Essex and had three sons and two daughters. His son Peter succeeded to the baronetcy.
- William Betham, The Baronetage of England: or The History of the English baronets, Volume 1
- The register of admissions to Gray's inn, 1521-1889
- Willis, Browne (1750). Notitia Parliamentaria, Part II: A Series or Lists of the Representatives in the several Parliaments held from the Reformation 1541, to the Restoration 1660 .. London. pp. 229–239.
|Parliament of England|
Parliament suspended since 1629
|Member of Parliament for Hythe
With: John Harvey
Not represented in Barebones Parliament