The fifteen-year-old heir to the throne of…
1000 CE
The fifteen-year-old heir to the throne of Pamplona (Navarre) (though he may have been as young as eight), the son of García IV the Tremulous and Jimena Fernández, daughter of the count of Cea on the Galician frontier, in 1000 becomes King Sancho III Garcés.
He also rules, through his regency, the county of Aragón.