 On 7 July 1029, before a council in Burgos, the capital of Castile, Óneca, aunt of the late García and queen Muniadona, formally adopted Sancho and Muniadona, making them her heirs.The record of the council is the first recorded instance of Ferdinand bearing the title of count.A later charter from the monastery of San Pedro de Cardeña, dated 1 January 1030, explicits lists Sancho as king in León (the overlord of Castile) and Ferdinand as count in Castile.