Thank you so much for your response and feedback, Jochen.
I am still very new here and wasn't sure what to enter for these particular birthplaces because the borders and names have changed so many times. My apologies for entering it incorrectly -- I will correct the error shortly.
I found handwritten notes from my grandmother that include some names, dates, and locations, some include what they would have been called in Hungarian and Slovak with some other Polish notes thrown in for good measure. There's also different information that I believe rules out the John Joseph Hruska noted in my original post as my great-grandfather.
According to these notes, John Joseph Hruska was born 17 January 1893 in Gemerska county which would have been in the Kingdom of Hungary/Austria-Hungarian Empire when he was born -- so I believe his birthplace should be changed to Austria-Hungary, correct? It was part of Czechoslovakia for ~ 5 years so my guess is that is the country referenced in my grandma's notes, thus the confusion. All of the documents I've been able to find after he came to the US show his name as John Joseph, which I'm 99% sure is anglicized. He died on 8 August 1973 in Pottsville, Pennsylvania. I would love to locate his birth certificate but without knowing the true spelling of his first and middle names I'll have to head back down the rabbit hole to find it. I suppose it could have been Jan, Janos, or Yanos (my grandmother's notes show a great-great uncle who spelled John as Yanos).
I hope this all makes sense. It makes more sense to me after taking a bit of a break and coming back to clarify things with this response.
Thank you again for your help!