References for John 2nd Duke, Earl Holand * of Exeter * of Huntingdon
Sir B. Burke: A Genealogical History of the Dormant, abeyant, forfeited and extinct peerages of the British Empire. London, 1866
J. Dupont, J. Saillot: Cahiers de Saint-Louis. Nantes, Angers, 1976 etc.
D.Schwennicke: Europäische Stammtafeln, Vol. III/1, Tafel 93. Marburg, 1984