Sancho III Ivrea of Castile (1156-1156) was born 1134 to Alfonso VII, King of León and Castile (1105-1157) and Berenguela of Barcelona (1116-1149) and died 31 August 1158 of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Alfonso VIII, King of Castile (1155-1214) | 11 November 1155 | 5 October 1214 | Eleanor of England (1162-1214) |
| Garcia of Castile (1156-1156) | |||