Sir John Saint John
Sir John was born in 1373 in Faumont, Glamorganshire, Wales.

 Elizabeth Paulet
Elizabeth was born in 1375 in Rhode, Somerset, England.  Elizabeth is no longer alive.

 Sir Oliver Saint John
Sir Oliver was born in 1400 in Bletsoe, Bedfordshire, England.  He died at the age of 37 in 1437 in Bletsoe, Bedfordshire, England.

 Joan Saint John
Joan was born in 1402 in Penmark, Glamorganshire, Wales.  She died at the age of 60 on July 5th, 1462 in Tolverne, Cornwall, England.

 Isabel Saint John
Isabel was born in 1404 in Penmark, Glamorganshire, Wales.  She died at the age of 22 in 1426 in Stoke D'Abernon, Surrey, England.