**Out of curiosity, Matthew 28:19 - is that true?**
Yes. Note that it says ‘name’, not ‘names’. But those aren’t names in Matt. 28:19, but titles. The saving name of the Father is Jesus, because Jesus Christ said he came in his Father’s name (John 5:43). The name of the Son is not ‘Son’, but Jesus (Luke 1:31). Jesus Christ said, “the Comforter, which is the Holy Ghost, whom the Father will send in my name..”. (John 14:26)
Acts 2:38 was the beginning of the actual fulfillment of Matt. 28:19. Whenever the apostles baptized, it was in the name of Jesus.
OK then...
Out of curiosity who is speaking in Matthew 28:19?