Where does “Sánchez” come from?

Sánchez (Spanish) comes from Spanish sancho, from Basque Santxo, from Late Latin Sanctius, from Latin sānctus, from Latin Iacobus, from Ancient Greek Ἰάκωβος, from Ancient Greek Ἰακώβ, from Hebrew יַעֲקֹב — heel of the foot; heel.

Sánchez (Spanish): son of Sancho