John V (Peter) (Duke of Brittany) de Dreux
John V (Peter) (Duke of Brittany) was born in 1389.  He died at the age of 53 in 1442.

 Joan de Valois of France
Joan de Valois of was born in 1391.  She died at the age of 42 in 1433.

 Francis I (Duke of Brittany) de Dreux
Francis I (Duke of Brittany) was born on May 11th, 1414.  He died at the age of 36 on July 17th, 1450.

 Peter II (Duke of Brittany) de Dreux
He died in 1457.