"you seem to be focusing on the Jewish name for God", the problem with arguing about it is manifold, but YHWH is in all probability not a "Jewish" or Hebrew name anyway. The god YHWH came from a nearby people, who spoke a language no doubt closely related among the Semitic languages to Hebrew, but different even so.
If you are arguing about whether "Jehovah" should be in the N.T at all, Scholars are not in agreement at all upon this. The arguments both ways are good.
As Pete says above, it isn't important as far as its use in the NWT is concerned apart from two aspects, one is that it is obvious that the bias of the NWT producers/editors is obvious as to when they do put "Jehovah" in and when they do not, and the second is the JW org. contention that they bow to the authority of the earliest M.S , they do not in this case do they ?