This article explains who could have gained Czechoslovak citizenship.
This is a complex legal question, which usually requires reviewing your particular circumstances. Here are three simple rules of thumb:
- If at least one of your direct relevant ancestors (parents, grandparents, and great-grandparents) remained in Czechoslovakia after July 1920, your chances are really good.
- If at least one of your direct relevant ancestors emigrated after July 1910, your chances are still really good but the tricky part will be finding the evidence.
- Finally, if all your direct relevant ancestors emigrated before July 1910, your chances are limited and mostly confined to various exceptional situations.