Sophia Wilhelmina Wallin (Yttergren)

[Kathaleen Smith]

I am searching for information on my great-grandmother, Sophia Wilhelmina Wallin.
 
Sophia was born 13 Dec 1867 Larbro, Hangvar, Sweden.  She has a twin sister Maria Georgina.  The twins were born to Catharina Josefina Hedvig Yttergren.  She was not married to their father (Georg Ekstrom from Visby, a sea captain?)  Sophia is supposed to have emigrated to the USA 26 Apr 1891.  I have not been able to find her emigration record.  On her marriage license (in the US) is the name Wallin.  Catharina (her mother) married Johann Petter Wallin after she had already had 5 children.  It has been said that all the children took the name Wallin, and since I cannot find any Yttergrens in America (so far) I have assumed she emigrated using that name.
 
Catharina Josefina Hedvig Yttergren  born 30 Apr 1842 Hangvar  Married 20 Sep 1879
Johann Petter Wallin  born 31 May 1857  Hangvar (drummer in the army).
 
Catharina's children:
Maria Georgina  (born 13 Dec 1867 Larbro, Hangvar
Sophia Wilhelmina (born 13 Dec 1867 Larbro, Hangvar
Oscar Edvard (born 5 Sep 1870 Stockholm
Ida Amalia Theresa (born 14 Aug 1873 Stockholm
Anna Catharina Irenia (born 22 Jan 1878 Hangvar
Edla Johanna (born 24 Jan 1884 Hangvar
 
The Yttergren grandparents of Sophia owned the Wasta mill in Larbro.  I am interested in learning about who they were as well as anything about Georg Ekstrom and Sophia's emmigration..  Any help I can get would be GREATLY apppreciated..