old english, makes me think of an old forest full of oak trees- definitaly a green name.  

Also found as Adkin and Atkins, Aiken is a Scottish surname derived from the name Adam + the diminutive suffix -kin. -kin was the normal diminutive suffix in the middle ages, though we don't use it anymore, many names from the period survive in surname form: Jenkins (John), Larkin (Lawrence) etc.
See Also: Adam

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