In the past, the Basque name "Aretxabaleta" was commonly used, both in Spanish and in English with the Spanish spelling, Arechavaleta. The local government (ayuntamiento) decided to officially change the spelling to the Basque "Aretxabaleta" on June 4, 1979. Their decision was authorized by Spanish central government on March 3, 1981.
^See e.g. a number of Spain travel guides in English published in the 19th century. Some of them can be found on Google Books by entering the Spanish names of this town and its neighbor, Arechavaleta Mondragon, in the search box (thus avoiding the hits in non-geographic context)
^Euskal Herriko / Boletin Oficial del Pais Vasco. May 11, 1981. Pp. 796-797.