It's what I believe based on the research of the respected linguists that I provided you. Burgn is the phonetic transliteration of Armenian
բուրգն.
But your argument is that "burg" (i.e. the Germanic word) is the most conservative version of the word. But the Germanic "burg" is pronounced with a hard G, which is the same as in Old Armenian and apparently Urartian, etc. If Germanic=PIE, the German word should be "burj" or "burzh".
I don't think anybody is suggesting that the root of burgn/burg, etc. is a 100% Armenian, but rather is came from a (likely centum, according to my sources) IE language. Maybe Graeco-Armenian. Maybe something else. Regardless, I don't see how this fits with your Germanic theory.
It seems likely to me that Armenian was spoken in the Urmia area by at least 1500 BCE, as pottery was found there that is identical to likely IE pottery dated to around the same time from Armenia.
As Pip and I have been discussing, it seems possible that Armenians are the product of 2-3 waves of likely Indo-European populations. The first one would be Eneolithic/EBA--the PPIE (I'm calling these people the Armani--they would likely have given rise or been closely related to the Hittites, etc.). These people were likely R1b. The second wave would be the "Steppe Armenians" (possibly from Catacomb) who arrived sometime between 2500-2300 BCE. These would be the Hatiyo/Haya/Hayo. This date corresponds with a) the traditional founding of the Armenian nation according to Moses of Korene (2492 BCE) b) the
Nature article about Armenian genetics that came out in 2015 and c) Pip's research. These people were likely R1b. Then a third wave would be a satem language from a culture that arrived in the LBA. According to Pip, they were
R1a-Z94 who were likely Indo-Iranian or Indic (perhaps the Mitanni or a related group, maybe the people who introduced the Indo-Iranain superstratum into Kassite). I'd imagine that they would have arrived by 1500 BCE.
According to the
Nature study, the Armenian ethnogenesis was largely completed by 1200 BCE, which is part of the reason why the Balkan theory or 1200 BCE-600 BCE introduction of the Armenian language by the hypothetical Armen tribe is impossible.
Any of the languages could have been spoken in Iran.
Here's the
Nature article that I was referring to:
https://www.nature.com/articles/ejhg2015206