Luke is the English version of Lucius, a roman name. With the advent of Christianity, it has been mostly associated with Luke the Evangelist, and hence has a strong Christian connotation, particularly in the Occidental culture (where it's mostly found).
Meanwhile, as far as my experience of SW universe tells me, there is an active effort in stories of omitting references to any human-known major religion. Thus, I find odd that who is allegedly the most central character of all the series has a Christian-associated name. It is hard to find other instances of this in SW. Another example is Tobias, a Hebrew name, part of the Bible, and the first name of the Solo character Tobias Beckett.
What is the justification (perhaps by George Lucas himself) of naming the main character of the whole series with a very familiar western (and popularly Christian) name, amid an evident effort of making no references to human-Earth religions?
PS: I am not judging Christianity in any sense. I just want to understand how to reconcile the above issue with the more general naming convention in SW.
PS2: this question (or others) have no relevant answer to the one here.