Five-Six years later, I hope you see this, and that you've found answers to your questions.
I wonder if you know of Golub that immigrated to or were born in the USA. I have in helping a friend stumbled across a Golub family if memory serves(it was awhile ago) they were in CA for the most part, but had moved there from somewhere in the eastern us(NY or Boston I think)
One name I recall is Ester .
Good luck
Barbara