smiddy3 : The early LXX used the divine name...Can you show it to me ?
There are a number of examples.
The earliest extant copy of the Greek LXX Psalms is P.Oxy 77.5101 which was probably written between 50 and 150 C.E. It contains the tetragrammaton in palaeo-Hebrew script as here in Psalm 64:2 (LXX)

Another papyrus which contains parts of the Greek LXX book of Job is P.Oxy. 50.3522. This is dated to the first century CE and also contains the tetragrammaton in palaeo-Hebrew. Here the tetragrammaton can be seen in Job 42:12 :

Then there is the well-known papyrus, P.Fouad 266b, which is dated to the middle of the first century BCE and contains parts of the Greek LXX of Deuteronomy including the tetragrammaton:

There is also a Greek rendition of the divine name in 4Q120, which contains parts of Leviticus and probably dates from the first century BCE. In Leviticus 4:27 it translates the tetragrammaton as IAW (or Jao) :

The earliest evidence for the use of kurios ("Lord") replacing the tetragrammaton is P.Oxy. 4.656 of the early 3rd century CE.