From the biography for Robert FitzRoger, 1st Baron Clavering in the Rootsweb onl...

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From the biography for Robert FitzRoger, 1st Baron Clavering in the Rootsweb online database posted by Jim Weber (accessed 1 May 2018), apparently from Sir Bernard Burke's Dormant and Extinct Peerages(Burke's Peerage, Ltd., London, 1883, p. 121): Clavering, Barons Clavering

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