this is my personal belief. I do not claim anyone elses, nor do I intend to convert anyone to mine.
I believe the people who became the Jews recorded their ideas of God in what we have come to know as Genesis. The first chapter speaks of Elohim, which is plural. The second chapter speaks of YHWH, which is also plural--BUT-is one family unit of 'gods', separate from, but a part of, Elohim(read the first two chapters of Genesis in a good comparative Bible that gives the Hebrew and Aramaic references and you will see the two accounts of creation are very different and contradictory IF you understand them to be the SAME creation--however if you see them as two different examples of creation they do not conflict. Elohim created the Universe and other humans, YHWH created the Garden and Adam and Eve--and Lilith, but that is a different story.) Yod-He-Vau-He is Father/Mother/Son/Daughter(or Bride) and denotes ONE family unit 'GOD'. Nothing wrong with this---the Jews were very family/tribe oriented, as all humans. It was only with the rise of warrior/patriarchal society that the Matronit(or Mother/Daughter) got lost in the shuffle. But it is still not difficult to find the Jehovah/Shekinah pair right up thru Solomons Temple in secular historical documents. I see the Old Testament-shift to-New Testament as the natural prgression from Father/Mother to Son/Daughter(Bride). So---basically the YHWH of the Jews and into the the God of the Christians is not a Trinity but a Quaternity. Even if you believe in the Trinity, there is still the Bride of Christ to consider. Holy Spirit may be called 'male' but it has all the qualities of a Mother, and the words used for it in the OT are feminine.
Many other religions have trinities too. Usually they consist of two sets of trinities, one male and one female, or just a female trinity with one male god who services all and manages to get himself sacrificed(and usually chopped up into pieces).
The oldest concept of 'God' is that it is female who gives birth to a son without the help of another male. Then when the Son grows into maturity, he then becomes consort to the Mother who is now represented by a Daughter, or has changed her aspect to 'Maiden' again so the cycle can be perpetuated. The Son becomes the Father and then conveniently dies, while the Maiden/Mother/Crone goes on some dark inner journey(winter-time) to get him back as a newborn Son(Winter Solstice). Sometimes it is the Son/Father who goes on the quest. But it varies little among the ancient mythos.
Personally, YHWH is not my particular name for my 'god'. I am not Jewish. But I do not think YHWH is necessarily ONLY a Jewish god either. I think it represents the common idea of god. I also do not believe YHWH is the ULTIMATE DIVINITY. That would have been Elohim in the Jewish mythos. So I can be a 'trinitarian' and a 'unitarian' at the same time. And I can go to a Christian service and not feel out of place. I can profess the 'Apostle's Creed' and not feel like I am a traitor to it. I just believe BEYOND it. And I equally respect the beliefs of my own particular heritage. I don't see them as conflicting because I understand where they all come from.
Ravyn