 Katherine De Roet Swinford Deroet, daughter of Sir Payne Deroet and Catherine d'Avesnes, Countess of Holland.Born 25 Nov 1350 Somme, Picardie, France, died 10 May 1403 Lincoln, Lincolnshire, England, 52 years Married/ Related to:  John Plantagenet, son of Edward Plantagenet, Edward III, King of England and N.N..Born 1340, died 1399, 58 or 59 years Children: 2. John (Marquis of Somerset) BeaufortBorn 1371 Beaufort, Maine-et-Loire, Pays de la Loire, France, died 16 Mar 9/10 London, London, England, approximately -1362 years | |||