Jules O. Daigle was born 4 December 1900 in Lafayette to Oscar G. and Eliza Landry Daigle. He studied for the priesthood at St. Joseph Seminary in St. Benedict, La., St. Mary’s in Baltimore, Maryland, and the North American College in Rome, where he was ordained in 1925.

He served as assistant pastor at St. Michael Parish in Crowley and Immaculate Conception in Lake Charles. From 1930 to 1974, he was pastor of Our Lady of Seven Dolors in Welch. He was made monsignor in 1952. After retiring in 1974, he launched a writing career and wrote several books on the Cajun heritage, receiving international recognition for his work. He was in demand for radio, television and newspaper interviews as an authority on Cajun language and heritage. He is most famous for the book A Dictionary of the Cajun Language. At the time of his death, he was in the process of writing another book about the history of Cajun culture, but left it unfinished. He died 2 January 1998 at the age of 97.