FI
Ferdinand I the Great
d. 1065
Vitals
Died
1065
Family
Spouse
About
Ferdinand the First united Leon and Castile for the first time under one crown, took tribute from the taifa kings, and is reckoned the true founder of the Castilian-Leonese monarchy.
Research notes
(Standard, undisputed royal genealogy of the houses of Castile, Leon and Navarre, entered 29 Jul 2026 under the project's relaxed rule for standard royal accounts.) FERDINAND I 'the Great', King of CASTILE (from 1029/35) and of LEON (from 1037), the two joined in him (c.1015-1065); son of Sancho III the Great of Navarre by Muniadona of Castile; m. SANCHA of Leon; father of Alfonso VI (our line). Direct ancestor.