proper noun/aˈɾanθaθu/
a village and municipality of Biscay, Basque Country, Spain; a sanctuary in Oñati, Biscay, Basque Country, Spain; a female given name transferred from the place name; a surname
Borrowed from Basque Arantzazu (literally “hawthorn place”). The given name is a shortening of María de Aranzazu, to whom the sanctuary is dedicated.