Aita José Antonio [Aita] de Donostia -real name: José Gonzalo Zulaica y Arregui- (10/01/1886 - 30/08/1956), a Spanish composer (from San Sebastián) and folklorist of a Basque nationalist group.

José Gonzalo Zulaica (10/01/1886 – 30/08/1956), better known by his pen name Aita Donostia (Father Donostia or Father San Sebastian, because he was a priest born in San Sebastian, Donostia in the Basque language), was a Spanish and Basque musicologist and composer. He was also known as José Antonio de Donostia.