The surname Blackment was first found in Durham but also in other areas of Britain including John Blakeman who was listed in Devon during the reign of Henry III  and in Norfolk where Blacheman filius Aedwardi was listed in the Pipe Rolls of 1166. Jordanus filius Blakeman was listed in the Pipe Rolls of Hampshire of 1188. A few years later the Pipe Rolls of 1206 listed John Blakeman in Surrey. 
This web page shows only a small excerpt of our Blackment research. Another 123 words (9 lines of text) covering the years 108 and 1086 are included under the topic Early Blackment History in all our PDF Extended History products and printed products wherever possible.
The New World beckoned settlers from the Scottish-English borders. They sailed aboard the armada of sailing ships known as the "White Sails" which plied the stormy Atlantic. Some called them, less romantically, the "coffin ships." Among the early settlers bearing the Blackment surname who came to North America were: John Blackman who settled in Dorchester in 1640; Nicholas Blackman who settled in Virginia in 1624; Thomas Blackman settled in Barbados with his wife, children and servants in 1679..