Help tracking down family origins from names on certificates #bessarabia #names #records

Aline Petzold

Hello All:
 I am trying to track down where my maternal great grandmother, Gitl Grinberg Vigderovici was born.  I have the marriage certificate of one of my grandmother's sisters.  It  mentions their mother, "Gitl, born of Avram Grinberg".  I tried to look up Avram Grinberg on JewishGen and on, but there are so many Avram Grinbergs and I have no way of knowing if any  of them is Gitl's father. To complicate matters, family lore also has my great grandmother's name as "Gitl Osias", but  I have no documentation for this.  Any suggestions as to how I can find out where Gitl was born and other details, such as her mother's name etc.?
Aline Petzold
St. Paul MN