>Could be a title for god, figuratively, metaphorically, anything
Except Holy Spirit is used as personal name.
"He (God) have sent me (God) and his Spirit"
"He (Father) will sent another, Holy Spirit, to be with you after I am gone"
"Holy Spirt procedes from the Father"
"Baptise them in the name of the Father and Son and Holy Spirt"
>All I know is the early church fathers did not believe the Holy Spirit was a person like Christ the Logos was
They introduce God as a Being unknown; they suppose Christ to be unbegotten; and as to the Spirit, they do not admit that He exists. Some of them say that the Son is a mere man, and that the Father, Son, and Holy Spirit are but the same person, and that the creation is the work of God, not by Christ, but by some other strange power.
The Epistle of Ignatius to the Trallians Chapter VI
You cannot get earlier than that.
The biggest and the most united denomination of Christians slapped not-trinitarian heretics on holy councils. And you little arians wish to talk to us about division?