Three members of the Holy Trinity.
It’s what many Christians believe.
Yes, the three are One, in the same way that the material universe has three aspects -- length, breadth, and height. Without one of the aspects, matter would not be tangible.
The totality (volume) of the universe can be known by the simple equation calculating the length, times breadth, times height.
The totality of God can be discerned by using the same equation as a metaphor -- Father times Son times Holy Spirit. The three are one, as Jesus said when he stated, 'I and my Father are one.' Each aspect representing the whole.
I suppose there are arguments over what the name of the Son of God (the Christ) is, which there shouldn't be. Jesus, in English, is plain enough for me. Other languages may have different pronunciations. But the principle holds. The equation doesn't change. The Son is Christ Jesus, who manifests the Father continually in the same way that the present manifests the future continually, for the future is the reservoir of time.
It seems like a mystery, but given enough thought, it should become more clear.
Thank you for your thoughtful reply.