General Notes

Guy de Thouars, who ran the Richmond estates, but may not necessarily have been recognized as Earl of Richmond.  Guy sided with the King of France against King John of England in 1203, whereupon his English lands were forfeited, after which the question as to whether he enjoyed recognition as Earl hardly arises.  [Burke's Peerage, p. 2402]

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She [Constance] married 3rdly, Guy DE THOUARS, brother of Almery, VICOMTE OF THOUARS. She died 4 or 5 September 1201, at Nantes, and was buried at Villeneuve. In 1201, after her death, Guy de Thouars was administering the honor of Richmond, the King ratifying leases granted by him, and in 1202 he had licence to sell his wood of Richmond, half the proceeds to go to the King and half to himself; on 2 April 1203 the King ratified the yearly farm to be paid by him for the honor. Later in that year he joined Philip Augustus, and his English lands were confiscated, grants being made from them in September 1203; this terminated his connection with Richmond. In 1204 he invaded Normandy at the head of the Bretons. In Brittany after Constance's death he occupied the position of regent until 1213, when Piers de Braine married his daughter Alice and was made Duke. He then disappears from history, and the date of his death is not certainly known; he was ultimately buried at Villeneuve at the same time as his wife and daughter.  [Complete Peerage X:794-7, (transcribed by Dave Utzinger)]