Original: In eastern Spain , Jacobus became '' Jacome '' or '' Jaime '' ; in Catalunya , it became Jaume , in western Iberia it became '' Iago '' , from Hebrew Ya'akov , which when prefixed with '' Sant '' became '' Santiago '' in Portugal and Galicia ; '' Tiago '' is also spelled '' Diego '' , which is also the Spanish name of Saint Didacus of Alcalá .
Simplified: In eastern Spain , Jacobus became '' Jacome '' or '' Jaime '' ; in Catalunya , it became Jaume , in western Spain it became '' Iago '' , and Portugal and Galicia it was Tiago .