what you have in way of records? Do you have the ancestor's arrival manifest? The church marriage record should have her place of birth.Are you guessing on Latvia or Lithuania as being the country of her birth?
Since the marriage was "arranged" than they were from same region or same location.
No going ahead with the research without a precise place of birth.
This must be your Anna MASSLON in SSDI Anna Masslon: Social Security Death Index (SSDI) Death Record Name: Anna Masslon State of Issue: Pennsylvania Date of Birth: ThursdayMay15, 1890 Date of Death: June 1985 Est. Age at Death: 95 years, 1 months
Her SS-5Form [costs $27] would have her place of birth and parents names.