Sancho was the son of unknown parents. The date and place of his birth have not been found.
His wife was Elvira García. They were married, but the date and place have not been found. Their only known child was María (?-?).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | conde en Erro y en Tafalla |