Isabel Courtenay Peerage person ID=118632 Parents Hugh de Courtenay Eleanor le Despencer Children Margaret St. John Siblings Margaret de Courtenay John Courtenay Egeline de Courtenay Aveline de Courtenay Hugh de Courtenay, 9th Earl of Devon Eleanor de Courtenay Philip Courtenay Partners John St. John, 1st Lord St. John of Basing