Thanks very much for checking. I guess it's possible that Asta and Hilda are cousins, not sisters. The information I am going off of comes from a letter a great aunt wrote that says that her mother had two cousins Hilda and Asta who came to the US and married the Pike brothers. They are my only link to definitively confirming my great great grandmother's heritage in Sweden.
One final question: On 11 Jun 1924, Hilda Pike arrived in Göteborg from NY on the ship Drottningholm with her kids Hilda, Frank and Virginia. They returned on 2 Aug 1924 on the ship Stockholm, and are listed as coming from Varberg. Would the Emibas CD have any additional information on who they were visiting? Their arrival/ departure were not recorded in the Varberg parish records.