More likely Bohemians - Bohunks. Lots of them moved to Texas and other places in search of farmland and a better way of life.
In the Pittsburgh/SW PA area, anyone Slavic was/is a Hunkie, and I heard it was slang for Hungarian, specifically for Slavs emigrating from the Austro-Hungarian region. I heard that a lot from my Pittsburgh relatives, though I grew up north of there. I'm not Hungarian either. I still occasionally make 'Hunkie soul food', i.e. noodles with cooked cabbage, pierogies, etc.