The prefecture of Marne is Châlons-en-Champagne, formerly called Châlons-sur-Marne - with the name "Châlons" being etymologically derived from the local Catalauni Belgic tribe.
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However, the link between the French Catalauni and the British Catuvellauni is not categorically proven: some texts assume they are connected (including, most recently, Graham Robb's "The Ancient Paths"), while others infer a lack of connection from the lack of proof.
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