That's actually an interesting cultural and language difference. Being Russian, I never thought about the offense meaning of the word "master" in English, at le

That's actually an interesting cultural and language difference. Being Russian, I never thought about the offense meaning of the word "master" in English, at least in this context. The reason is that in Russia word "master" ("мастер") means something like "an expert in his field", usually referred to professionals. It seems that it has the same Latin root but evolved into a different meaning. So the Russian meaning is more close to the Italian "Maestro". And for me, that meaning was a good fit for the "master" branch, like it contains something professionally made or finished, and just learned that Americans put different meaning when they were deciding on the branch's name.