If my great-great grandparents were born in Czechoslovakia and immigrated to the U.S. in the late 19th and early 20th centuries, is there a chance my grandmother or myself would be eligible for Czech citizenship by descent?
My maternal grandmother's grandparents and other family immigrated to the U.S beginning in the late 19th century. As for evidence, I'm not entirely certain what we have as there are boxes and bags that have gone untouched for decades in her home. I do know that we have letters, post cards addressed to our ancestors (many are in Czech, though I believe most were sent between addresses in America), my great-great grandmother's American marriage certificate (as well as many photographs), and some sort of servant's work journal in German and Czech from one relative who must've been working in Austria-Hungary as I believe it is from there. I doubt that we would have any birth certificates or anything from those who immigrated, but we may have death certificates from here in the U.S. We have lots of things in the family though, so more could come up if we searched.
Additionally — and I am unsure if this would add to anything or if we have any proof behind my grandmother's word (it may be present in contemporary correspondence) — my grandmother's great-grand parents returned to Europe before the second world war and, as she tells me, had all their belongings, property, and money confiscated and spent the remainder of their days in a German concentration camp. I am certain I could get their names and some sort of documents related to them.
Would either my grandmother or myself have any luck pursuing a claim to citizenship by descent based on the information I provided? Thank you in advance for your time.