English Meaning: The name Ainsley is an English baby name. In English the meaning of the name Ainsley is: Derived from the Brittish Nottinghamshire place name of Annesley.From Ann's meadow.From the awe inspiring one's meadow.n English the meaning of the name Ainsley is: Derived from the Brittish Nottinghamshire place name of Annesley. From Ann's meadow. From the awe inspiring one's meadow.