Blakeman was born in Staffordshire, England in 1598, according to his matriculation records at Christ Church College, Oxford.
Blakeman matriculated (entered college) at Christ Church, Oxford on 28 May 1617.
He was a preacher for some years in Great Bowden, Leicestershire, and in Derbyshire, and in 1638 went to Connecticut.
In 1639 he led the original settlers of Stratford, Connecticut, and served as the first minister of the church until his death on 7 September 1665.
During the 17th century (and until well into the 19th century) consistent spelling of names was not enforced, due to lower literacy levels and the absence of the standardization required by government bureaucracies.