References for Richard Seigneur, Lord FitzGilbert * de Bienfaite et d'Orbec * of Clare and Tonebridge
Sir B.Burke:
The Dormant and Extinct Peerage.
London, 1866
D.Schwennicke:
Europäische Stammtafeln, Vol. III/1, Tafel 156.
Marburg, 1984