San Diego translated is Saint Didacus.
Despite being a cognate, San Diego does not refer to Saint James but to Saint Didacus of Alcalá.
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Santiago (name) - Wikipedia
Origin of San Diego
From Spanish, from Santiago, a combination of "Sant' Iago", and "Saint James". Sant is from Latin Sanctus, "holy" or "saint". Iago is a northwestern Spanish form from Latin Jacobus, "James". The name Diego is sometimes confused with the Latin name Didacus.
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San Diego Definition & Meaning |