The immigration record of Ona Kedenytė says she is going to her brother in law, Vincas Swilpas. See https://www.familysearch.org/ark:/61903/3:1:33SQ-GP1H-DH? line 13. The correct name in Lithuanian is Švilpas. It seems likely that this was Mary Shellpak's original family name, and therefore she would have been Švi̇lpaitė.
