Two interesting points:
1) in our language "kat" means executioner. Relation - probably had been brought in from the East during the crusades.
2) "woman" is often as a second part of name, like "gina" (
Regina, Königin (queen, literally King-woman) in our slavic language Kněžna (pronounce kiniezhnah) would be in dialects as "kněgiňa" (pronounced something like kinieginijah) - gina is even in the the "vagina". But here the "woman" is fusing with "evan", which comes close to
Eva,
Eve,
Ivana, Živana Livana,
Livia and host of other womens' names, which all of them have one thing in common: "Live". In Slavic languages Life is "život", i.e. Živana is associated with life and so are all these other names. Now if I can get "evan" from
Ketevan, it gives the "life" part into the name. Also one might interpret this one name
Ketevan in lower or higher ranks, from
Queen to just a housewife - but the principle here should be that this is not the single housewife, but "ruler" of her household. That's where all comes together - it might be the lowest and poorest family, but the lady there rules its family and household like a queen.
Now, notice the similarities of
King and
Queen and Kete - they all start with K (Kveen you might say for Q). And Königine or Kněžna also start with K, followed by "n". Kete - there is K followed by "t" - but where do you create the t? On your upper palate, the same as n. Only n is nasal, but touches the same place in mouth. Therefore in times past, where the characters were not fixed by being written, it was easy to slide from t to n or vice versa. So Kete as queen is very plausible even when looking through the prism of European languages.
For me a wonderful take away here is that "
Eve" and "
Gina" might come from same base: giving life.
And as we go back more and more in the past and become less and less politically correct, we find that our ancestors gave names that were very fitting: giving life used to be an awe-inspiring event and no wonder that men were venerating women for their ability to give life. I also laugh today when there is the gender debate in English speaking countries and they don't realise that even "woman" is a perfectly acceptable term even from their sick point of view, because "woman" sounds (and I am sure it was originally meant) same as "womb-man", i.e. human with a womb, so the genderists have what they wanted - that a woman is a man, but has one very important body part on top of it. Simple as that, and unless a woman does not undergo hysterectomy, she will always have that one "supernatural" part of body. :-D