Catherine De+ Roet 
Catherine De+ was born in 1350 in Picardy, Somme, France. Catherine De+'s father is Payn+ Roet. She was an only child. She died at the age of 53 on May 10th, 1403 in Lincoln, Lincolnshire, England.General Notes
The children of Catherine de Roet with John Plantagenet, as his mistress before their marriage, were legitimized in 1397 by act of Parliament. They were given the surname "Beaufort" after one of Joh n's estates.
Sources: LDS Ancestral file 8J5H-L2 and "Stimpson Family", Cory Stimpson at AWTP.
‌Catherine De+ and John Of Gaunt+ were married in a religious ceremony on January 13th, 1396 in Children legitimized in 1397 by Act of Parliament. They had two sons and a daughter, named Henry, John De+ and Joan De+.
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Children
Henry Beaufort
Henry was born about 1372 in Chateau De Beaufort, France. He died on April 11th, 1447 in Wolvesey Palace, Winchester, Hampshire, England. He was buried in Cathedral Winchester, Hampshire, England.
John De+ Beaufort
John De+ was born in 1373 in Chateau De Beaufort, Maine-Et-Loire, France. He died at the age of 37 on March 16th, 1410 in St. Catherine By The Tower Hospital, London, Middlesex, England. He was buried in St. Michael's Chapel, Canterbury Cathedral, Kent, England.
Joan De+ Beaufort
Joan De+ was born about 1375 in Chateau (Castle) Beaufort, Maine-Et-Loire, Anjou, France. She died on November 13th, 1440 in Howden, Yorkshire, England. She was buried in Lincoln Cathedral, Lincoln, Lincolnshire, England.