The main criterion used in the preparation of this List of Basque Surnames was that of adapting Basque surnames to academic spelling. However, the Committee did not want to limit itself to a mere adaptation, bearing in mind that Basque has not been official down the centuries and, as a result, neighbouring official languages have wrought substantial changes in the spelling of many surnames. So the Committee has tried to restore the Basque form and the correct spelling of the surnames.

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