That's not all people on Polish Forums saying that Bernatowicz is actually Armenian.
Does it really matter what it's origins are is at this stage? If you want to trace your ancestors, knowing the origin of the surname is not necessarily going to help you. I've seen cases of people completely adopting a different surname in earlier generations and that new surname then carries down through the generations - I have an example of this in my own family. People also have aliases for various reasons. The possibility of illegitimacy also needs to be considered.
But if you are merely trying to discover the origins of your surname, maybe you should do some investigation in the country/countries where your family members came from? Presumably you can speak the language which I imagine would be an essential requirement.
What people of forums say is not necessarily correct. It could also be the case that the surname is widespread over numerous countries, spellings may vary though the roots of the name may be the same, surnames which sound similar may have different origins. It's a bit of a minefield.
Once again I would advise you to speak to the 'elders' in your family. Write down everything they tell you. It is amazing where a name or place which might seem insignificant, can lead you.