Oneness Pentecostals, who today comprise roughly one-fourth of all Pentecostals and are also known as “Jesus’ Name” Pentecostals, represent the most radical theological departure of any Pentecostal group. Essentially, these churches teach a unitarianism of the Son that denies the traditional doctrine of the Trinity and claims that Jesus is Father, Son, and Holy Spirit. They (re)baptize in Jesus’ name and are also the only major grouping of Pentecostals who teach (or at least imply) that speaking in tongues is necessary for salvation.

Oneness Pentecostals, who today comprise roughly one-fourth of all Pentecostals and are also known as “Jesus’ Name” Pentecostals, represent the most radical theological departure of any Pentecostal group. Essentially, these churches teach a unitarianism of the Son that denies the traditional doctrine of the Trinity and claims that Jesus is Father, Son, and Holy Spirit. They (re)baptize in Jesus’ name and are also the only major grouping of Pentecostals who teach (or at least imply) that speaking in tongues is necessary for salvation.
Pneumatology, Veli-Matti Karkkainen