Buenaventura Sitjar (born 9 December 1739 in Porreres, Majorca – died 3 September 1808 at San Antonio, California) was a Franciscan missionary who served in California until his death.
He helped found Mission San Antonio de Padua and served there until his death on 3 September 1808.
[1] With the assistance of Father Miguel Pieras, he wrote a dictionary translating the language into Spanish.
Although the list of words is not as long as Felipe Arroyo de la Cuesta's dictionary of 2884 words and sentences in the Mutsun idiom of Mission San Juan Bautista, Sitjar's gives the pronunciation and fuller explanations.
This work forms the seventh volume of John G. Shea's Library of American Linguistics (New York, 1861), and was published separately under the title of Vocabulary of the Language of the San Antonio Missions (1863).