was Czechoslovakia part of Austria.?
On immigration paperwork, your grandparents didn’t give the answers themselves. The ship’s purser actually filled out the manifest, using passport/visa information, and then handed it over to the port authority or immigration officials when the ship landed. Because the Empire of Austria-Hungary ruled the land where your great-grandparents lived, they were carrying Austrian passports. That’s why they’re listed as Austrian on immigration paperwork. The second part is that the Empire of Austria-Hungary disintegrated after WWI. Then everyone from all of those countries was free to use their own homeland’s name as their ethnicity or place of birth. Czechoslovakia was only a united group of lands between the end of WWI and the fall of Communism. It’s now 3 different countries. They were never all that friendly, but it was a bit of “economies of scale” that kept them together for convenience. But they were horrible allies. The last part is that the Census was self-reported. If they wanted to