Possible breakthrough on Ashchur

In a previous post I discussed some possible Egyptian influences on the Tribe of Yehudah. One of the names mentioned was one Ashchur (אשחור) of the tribe. As it turns out, in some of the documents recovered from the Jewish military settlement in the Elephantine, a man named Aschur (אסחור) is mentioned! I saw this in the book "The Ten Tribes" by Alter Walner. He states there that the man was an Egyptian who eventually married one of the possibly more prominent Jewish women of the settlement (there were also non-Jews stationed there) and in later documents, his name was changed to "Natan", so perhaps he converted. I was a bit skeptical to his Egyptian status, though. True, his full name is Aschur ben Tzacha, not really a Jewish name, but the ending of the Alef in Tzacha made me think that perhaps Tzacha was the Aramaic shortening of Tzachyah, much like Ezra is the shortening of Azaryah. As to why he had two names, perhaps it was like other figures who had more than one name, such as King Uzziyah, also known as Azaryah (and according to R' Marcus, also known as Zecharyah).

The difference between Ashchur and Aschur can of course be explained by the linguistic differences between different tribes (it's unclear from which tribe/s were the people of the Elephantine). For example, the people of Efraim would say s' instead of sh'.

But even if it is an inherently Egyptian name, it's still an interesting find, and aderabah, may make finding out the meaning of the "ash" part easier, as more research into the meaning of ancient Egyptian words seems to be out there.

Update:

I discovered there's an Egyptian text called The Story of Wenamun. Mentioned in it is an Egyptian priest named Herihor. A search on google informed me that his name means "Horus protect me". That tipped me off to look at Horus's etymology. While some think it simply means "falcon" (one of Horus's prime symbols), other think it may mean "the distant one" or "one who is above, over". That's fantastic actually, because it ties into the Hebrew Khur.

While this still doesn't tell me what Ashchur/Aschur mean, it's a step closer to that. It also appears to strengthen the understanding that at least one language, if not both of them, derived words from the other.