hi I'm trying to find maiden name for Fannie Scwartz 
Where's best place to look 
She was born in Russia around 1870
According to 1920 census she  was born Russia .can't read or write  . immigration year given as 1892 
Stated that parents born Russia 
  
Married to Aaron Swartz        he was b 1865  Roumania.   And Died 28 Nov 1924
Their children all born New York or Pennsylvania
  Approx birth years from censuses Esther 1892 Gerson/ Saul 1894  Sadie 1895 Solomon 1894 Abraham 1904 
Rusians to America  record  has  Fany Scwartz age 20    aug 1891 on SS Anchoria
 from Glasgow
She is with a lot of other young Russian born people but not her husband 
Or could this be a different Lady?
I can't find her death 
And don't know where the couple met or married 
If Esther is her birth daughter they would have had to marry before 1892 
Aarons parents were called Joseph scwartz and Esther halpert 
Fresh pair of eyes would be useful
Moderator edit: surname corrected in subject line at OP's request.