Ancient attestations It is attestested with various words:
Hesperenne (1247 in Cartulaire de
Bayonne)
Santus Johannes de Ahesparren,
Hesparren und
Haesparren (the former two 1255 and 1288 in Chapitre de Bayonne),
Ahezparenne (1288, Rôles Gascons),
Esparren (1310, Cartulaire de Bayonne - and not form "
Haritz barne" (Inner Oak) as the local tradition says.
Other toponyms The toponym
Elizaberri appears with the from
Éliçaberria (1863, dictionnaire topographique Béarn-Pays basque). The toponym
Celhay appears ==Population==