References for Major Señora Guillen de Guzman * de Alcazer, Viana y Azañon
J.W. v.Imhof: Genealogiæ Viginti Illustrium In Hispania Familiarum. Leipzig, 1712
R.Sanchez Saus: Linajes Sevillanos Medievales. Sevilla, 1991
D.Schwennicke: Europäische Stammtafeln, Vol. II, Tafel 63. Marburg, 1984