Let me talk about what I think is the Holy Spirit to a Christian living around 0CE and what they probaby think about the Trinity. I'll talk about it without anyone paying me or knowing who I am, no bribes that can taint my opinion. Wisdom is in the Jewish canon usually feminine, and in Christianity this may correlate with the Holy Spirit.
You're absolutely correct about the feminine personification of Divine Wisdom (as the
amanuensis and emanation of God's presence on earth or within people) in the sapiential texts of pre-Christian Judaism, namely
Chokmâh rendered into Greek as
Sophia.
We can find this personification of God's divine 'daughter' or 'female manifestation / co-agent of creation' in the Book of Proverbs in the Tanakh, in the Book of Sirach (200 BCE), in the Wisdom of Solomon (first century BCE) and other ancient Jewish 'wisdom' literature within and without the Bible.
In
Prov. 8:1–30, for instance, we read: "
Does not wisdom call, and does not understanding raise her voice?....I, wisdom...before the hills, I was born (holalti), when he established the heavens I was there...when [God] marked out the foundations of the earth, then I was beside him, like an amon; and I was daily his delight, playing before him always."
"
Amon" is a hapax legomenon (appears only once in the entirety of the Hebrew Bible, with no parallel) but the majority of scholars render it as "
little child" or contrarily "
masterworker". The ancient Septuagintal version thus renders this into Greek as
harmozousa, “
the woman who holds all things together in harmony" through a combination of both meanings.
What we thus have here - described by this ancient Jewish biblical author - is a literary personification of Divine Wisdom as the "little daughter" or "masterworker" (
amon) of God begotten (
holalti) "before the ages" and existing 'beside' the God of Israel from all eternity ("
when he established the heavens" and "
marked out the foundations of the earth") as his co-agent of creation in whom God "
delights".
Now, one can take this description as mere 'literary artifice' or as insinuating something
literal about the nature of God. The early Christians were part of a tradition of 'binatarian' Jews - 'heretical' from the vantage point of the growing/developing Rabbinic orthodoxy, especially after the collapse of the Second Temple in 70 A.D. and the extinction of rival sects like the Sadducees and Essenes - who understood the divine
chokmah to be a literal description of the nature of God.
The Jewish author of the
Book of Sirach (132 BCE) seems to have understood 'Wisdom' in this second literal sense and has her deliver a solemn first-person narrative about her origins in eternity:
(24:3) I came forth from the mouth of the Most High,
and covered the earth like a mist.
(4) I dwelt in the highest heavens,
and my throne was in a pillar of cloud.
(5) Alone I compassed the vault of heaven
and traversed the depths of the abyss.
(6) Over waves of the sea, over all the earth,
and over every people and nation I have held sway.
Note, how Wisdom - this eternal divine ordering principle, who came into being prior to the creation of the world - is described as coming "
forth from the mouth of the Most High", that is she is portrayed as the
Word of God. This is the exact same sense in which the NT authors employ the sapiential tradition, they too equate 'Wisdom' with the 'Word' of God which for them is Jesus's pre-incarnate status.
However, there is also a pre-Christian Jewish equation of 'Wisdom' with the 'the Spirit' (i.e. the spirit of God hovering over the waters of creation in Genesis 1:2 and referred to in Joel 2:28 as being "
poured" out so that the sons and daughters of Israel will prophesy).
This can be seen in the
Wisdom of Solomon (a Jewish text written in the first century BCE) which refers to Wisdom as the 'breath' of God:
(7:25) She is a breath of the power of God,
and a pure emanation (aporroia eilikrinēs) of the glory of
the Almighty;
therefore nothing defiled gains entrance into her.
(26) For she is a reflection (apaugasma) of eternal light,
a spotless mirror of the working of God (tēs tou theou
energeias),
and an image (eikōn) of his goodness.
Where I would disagree partially with your argument, is that the New Testament equates Divine Wisdom with Jesus the pre-incarnate 'Word' and not with a 'distinct' Spirit (the personhood of the 'Spirit' was to emerge gradually in the unwritten tradition of the church after the close of the apostolic New Testament era, it is not explicit in the NT).
Thus, in the New Testament we find Jesus described as the pre-incarnate Wisdom of God:
"...
We proclaim Christ crucified, a stumbling-block to Jews and foolishness to Gentiles, but to those who are the called, both Jews and Greeks, Christ the power of God and the Wisdom of God...
Among the mature we do speak wisdom, though it is not a wisdom of this age or of the rulers of this age...But we speak God’s wisdom, secret and hidden, which God decreed before the ages for our glory. None of the rulers of this age understood this; for if they had, they would not have crucified the Lord of glory."
(
1 Corinthians 1.23, 2:1-14)
"
I want their hearts to be encouraged and united in love, so that they may have all the riches of assured understanding and have the knowledge of God’s mystery, that is, Christ himself, in whom are hidden all the treasures of wisdom and knowledge...
He is the image of the invisible God, the firstborn of all creation; 16 for in him all things in heaven and on earth were created, things visible and invisible, whether thrones or dominions or rulers or powers—all things have been created through him and for him"
(
Colossians 2:2-3)
This is reflected in the mother church of Eastern Orthodoxy being called the
Hagia Sophia:
Holy Wisdom - Wikipedia