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| Date | Place | Source | |
| Born : | 1017 | Burgos, Spain | - | 
| Died : | 27 Dec 1065 | Leon, Spain, ruled 1035-1065 | - | 
| Age : | 48 | 
| Ref. : | 3051 | 
| Notes : [] Titles: Count of Castile 1029 - 1065 King of Castile 1038 - 1065 King of Leon 1038 - 1065 Died of Natural Causes at age 50 Ferdinand was the first ruler of Castile to take the tile King. | 
| Father | Mother | 
| Sancho III the Great King of Navarre | Muniadona Sanchez of Castille | 
| Marriage | Children | 
| 1033 - Sancha Princess of Leon | 1030 - Alfonso VI The Valient King of Castile and Leon 1035 - Sancho II King of Castile and Leon Abt. 1042 - Garcia King of Leon and Galicia | 
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