The Name of the old testament God is never mentioned in the NT because they were writing about the evolution of Jesus starting out as the son of god and then becoming an almighty god. Jesus becomes the Alpha and Omega read the last couple of chapters of Revelations. This is almost an exact copy of what happens with the Babylonian gods Ea/Enki and his son Marduk. Marduk rises up among the gods and battles and defeats the dragon Tiamat. Jesus as we know does the same. In another story very similar involving the orginal gods of the Israelites Baal Hadad son of El also defeats a dragon Lotan goes on to defeat the god of the underworld called death Mot. Jesus also defeats death as well.
Both Hadad and Marduk get promoted by doing these acts, Marduk becomes king of the gods lord of lord the alpha and omega. He too becomes creator of the earth by cutting open Tiamat and making part of her the heavens and part of her the earth.
So the Jesus story is not about a trinity but a copy of the Marduk story, Jesus being elevated Just like Marduk was. No where does Marduk become his father neither does Hadad become EL.
More proof of this is in the old testament stories of Noah's flood and the Tower of Babel. In both stories its Enki/Ea Marduk's father that warns Gilgamesh/Noah and confuses the language at Babel.