Luddenham, Kent - a hamlet or small village near Faversham in Kent, England.
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Luddenham, New South Wales - a suburb of Sydney, in the state of New South Wales, Australia.
His elder brother was the more famous Gregory Blaxland and Luddenham was the name of their family property in Kent, England.
George Porter, Baron Porter of Luddenham (1920–2002), British chemist and Nobel prize winner