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Olaiz is a council1 and Spanish town in the municipality of Oláibar, belonging to the Foral Community of Navarre. Toponymy The place is known as Olaitz in Basque.1 History The place had its own town hall.2 The municipality of Olaiz disappeared in the face of the census of 1857, when it merged with the rest of the places in the Oláibar valley to form that of Oláibar.2 Towards the middle of the 19th century, the place had a population of 35 inhabitants.3 It appears described in the twelfth volume of the Geographical-Statistical-Historical Dictionary of Spain and its Overseas Possessions