Joanes Leizarraga

Joanes Leizarraga (1506–1601) was a 16th-century Basque priest. He is most famous for being the first to attempt the standardisation of the Basque language and for the translation of religious works into Basque, in particular the first Basque translation of the New Testament.

French spellings of his name are often encountered in older works, for example Ioannes Leiçarraga and Jean de Liçarrague and various other spellings of his surname such as Leissarrague or Leiçarraga, or Juan de Lizárraga in Spanish.