origin
The name Blatchley is Anglo-Saxon, and is related to Blacksley, Blachly, etc. The meaning of the name is uncertain; some sources say it refers to an occupation, where "Blatch" = bleach. Others have it as a place name, referring to a Black Lea (dark meadow). The earliest known appearances of the name are in Lancashire in pre-Norman times, but whether it refers to an occupation or a place (or both), there could be many unrelated Blatchley lines in England.