Where does “seint” come from?

seint (Anglo-Norman) comes from Old French saint, from Latin sānctus, from Latin Iacobus, from Ancient Greek Ἰάκωβος, from Ancient Greek Ἰακώβ, from Hebrew יַעֲקֹב, from Hebrew עָקֵב — heel of the foot; heel.

seint (Anglo-Norman): Alternative form of saint