John of Gaunt \Duke of Lancaster\
John of Gaunt \Duke of was born on June 24th, 1340 in Abbe de St Bav, Ghent, Flander-Oriental, Belgium.  He died in Leicester Castle, Leicester, Leicestershire, England.  He was buried on May 15th, 1398 in St Pauls, Cathedral, London, Middlesex, England.

 Blanche Plantagenet
Blanche was born on March 25th, 1345 in Lancaster, Lancastershire, England.  She died at the age of 24 on September 30th, 1369 in London, Middlesex, England.

 John Plantagenet \Prince of England\
John Plantagenet \Prince of was born in 1364 in Somerset, England.  He died at the age of 46 in 1410 in England.