2025DEC30: The names of the parents of Marya Sowa are extracted from her death document. I have acquired three candidate immigration documents for Jan Sowa, her named father. (Jan Sowa is a surprisingly frequent name in records, but none connected to Marya are found.) However, I have failed to find any documents subsequent to immigration that support any assumption of a presence of her father in the USA. As a result, I have determined to remove the immigration event from the history of her father, pending some future confirmation.