Born in Deir-El-Ahmar, Lebanon, close to the Roman city of Baalbeck, Sister Marie Keyrouz is a member of the Congrégation des Surs Basiliennes Chouérites and founder-president of the National Institute of Sacred Music in Paris. Religiously, Keyrouz is a Maronite from her family's side and a Melkite through her religious congregation. She received a Doctorate in Religious Musicology and Anthropology from Sorbonne University, Paris (1991), an M.Phil. in Religious Sciences from Saint-Joseph's University, Beirut, and one in Western (Oratorio) and Oriental Classical Music (Vocal) from the University of the Holy Spirit, Kaslik.

Sister Marie Keyrouz, Soeur Marie Keiruz, Soeur Marie Keyrouz, Soeur Marie Keyrouz S.B.C, Sœur Marie Keyrouz SBC, Sœur Marie Keyrouz, S.B.C, Sœur Marie Keyrouz, S.B.C., Syster Marie Keyouz