This study traces the origin of Jesus' Name Pentecostalism in Mexico to determine its distinctives as a Mexican movement. The movement has historically been called -Jesus Only- or -Oneness-. While focusing on the "Iglesia Apostolica de la Fe en Cristo Jesus, Iglesia Evangelica Cristiana Espiritual," "La Luz del Mundo," and "El Buen Pastor" are briefly discussed. The Oneness doctrine of the Trinity is examined to determine its adequacy as a trinitarian theological model. The assertion is made that Western Christianity must accept and promote the use of alternative theological models in non-Western contexts in order to assist the Christians of the Third World to develop meaningful contextualized theology for their own cultures."