John Plantagenet
John was born on June 24th, 1340 in Abbaye St. Bavon, Ghent, Flanders, Belgium, Netherlands.  He died at the age of 58 on February 3rd, 1399 in Castle, Leicester, Leicestershire, England.  He was buried on March 15th, 1399 in St. Paul's Cathedral, London, Middlesex, England.

 Katherine de Roet
Katherine de was born in 1350 in <, , Picardie, France>.  She died at the age of 53 on May 10th, 1403 in , Lincoln, Lincolnshire, England.  She was buried in Cathedral, Lincoln, Lincolnshire, England.

 John Beaufort
John was born about 1371 in , Pottersgate, Lincoln, England.  He died on March 16th, 1410 in St. Catherine by the Tower Hospital, London, Middlesex, England.  He was buried in St. Michael's Cathedral, Canterbury, Kent, England.

 Joan de Beaufort
Joan was born about 1375 in , Château Beaufort, Meurthe-et-Moselle, France.  She died on November 13th, 1440 in Howden, East Riding, Yorkshire, England.  She was buried in Cathedral, Lincoln, Lincolnshire, England.