Sir Henry of Grosmont 1st Duke of Lancaster
Sir Henry of Grosmont 1st Duke of was born about 1308 in Grosmont Castle, Grosmont, Monmouthshire, Wales.¹   He died on March 24th, 1361 in Leicester Castle, Leicester, Leicestershire, England.¹ 

 Isabella De Beaumont
Isabella was born in 1315 in Loughborough, Leicestershire, , England.²   She died at the age of 45 on March 24th, 1360 in Leicester Castle, Leicestershire, England (of the Black Plague).² 

 Blanche Countess of Derby
Blanche Countess of was born on May 25th, 1345 in Castle Grosmont, Grosmont, Monmouthshire, Wales.¹   She died at the age of 24 on September 12th, 1369 in Bolingbroke Castle, Lindsey, Lincolnshire, England.¹