All good questions.
I have not found baptismal records for my Grandmother Helen, nor for her brother Joseph who was born here. Their Maryland birth certificates only say Bohemia for their parents place of birth.
My great-grandfather did not refer to any relative on the paperwork when he arrived alone. It seems he was the first to arrive. There are also no family stories at all about other relatives being in the USA outside of the immediate family.
It appears at this point that none of the “old country” born family members ever became naturalized citizens. I have found no such records for Josef and my great-grandmother Katerina. Son Franz died as a child after arriving. Daughters Mare (Mary) and Ana (Annie) both married but no record of them becoming citizens has been unearthed yet.
Any help is appreciated!