Proper noun
(countable) A habitational surname from Old English.
(uncountable) A placename:
A small village and civil parish in Maidstone borough, Kent, England (OS grid ref TQ8057).
A civil parish (served by Thurnham with Glasson Parish Council) in City of Lancaster district, Lancashire, England; settlements include Lower Thurnham and Upper Thurnham.
Source: en.wiktionary.org