John Fairborn Marquis Somerset De Beaufort
John Fairborn Marquis Somerset was born about 1375 in de Beaufort Castle, Meuse-et-Loire, Rhone-Alpes, France.¹   He died on March 16th, 1410 in Royal Hospital and Collegiate Church of St. Katharine-by-the-Tower, London, England.¹ 

 Margaret (Lady) De Holand
Margaret (Lady) was born about 1384 in Upholland, Lancashire, England.¹   She died on December 31st, 1439 in St. Saviour's Abby, Bermondsey, London, England.¹ 

 Margaret (Lady) De Beaufort
Margaret (Lady) was born about 1400.  She died in November 1449.

 Henry (2nd Earl of Somerset) De Beaufort
Henry (2nd Earl of Somerset) was born on November 26th, 1401.  He died at the age of 16 on November 25th, 1418.

 Earl of Kendal 3rd Earl of Somerset' De Beaufort Sir John 'Knight' '1st Duke Somerset
Earl of Kendal 3rd Earl of Somerset' De Beaufort Sir John 'Knight' '1st Duke was born on March 25th, 1404 in Westminster, London, Olde England.²   He died at the age of 40 on May 27th, 1444 in Wimborne Minster, Dorset, , England.³ 

 Thomas (Earl of Perche) De Beaufort
Thomas (Earl of Perche) was born in 1405.  He died at the age of 27 in 1432.

 Sir Edmund Plantagenet, 1st Duke Somerset Debeaufort
Sir Edmund Plantagenet, 1st Duke Somerset was born before 1406 in Somerset, England.⁴   He died on May 12th, 1455 in St Albans, Herefordshire, England.⁴