I’d like to return to one point in the OP – does the name “YHWH” apply only to God the Father in Christian dogma, or to the entire godhead?
The holy ghost would not have a specific name as it is the symbol for the inbetween of logos and mythos, or the movement past a literal symbol to that symbol’s meaning. The holy ghost is more of a verb, a representation of realization of God in Jesus, or God in You.
Though according to Exodus, God’s name is: I AM WHO I AM.
Which rather fits. I AM.
Perhaps that’s really the only name anyone ever truly has.