Velasco (or Blasco) Sánchez (floruit 1153–1181) was an Iberian nobleman who held various political and military offices in three different kingdoms, serving under Afonso I of Portugal, Alfonso VIII of Castile, and Ferdinand II of León.
In that same year, just before going to war, and fearing that he might die without a chance to make a last confession, Velasco dictated his will, wherein he pledged the three villages he owned to three religious establishments: Barazas to the Hospitallers, Azarón to the Church of the Holy Sepulchre, and Coleo to the Cathedral of Santa María.
Late in 1172 he went into exile at the court of Alfonso of Castile, who made him the governor of Ávila in April 1173.
[5] In August 1177 he was governing Cubillas and Medina del Campo and in October Monforte de Lemos.
Among the lesser fiefs governed by Velasco on behalf of the crown of León were Toro (March 1175) and Valdeorras (August 1180).