Mother's name for Brayndl Zilberberg

The "name" Faybla is the result of indexing.
If you read the JRI pages carefully then you will find that the JRI web index is a result of a triple transfer from the original record. During these transfers faults may occur. The name in the record obviously was Taybla which is a diminutive of Tauba. During the indixing procedure Taybla became Faybla.
People with minimum knowledge of Jewish names know that Faybla is not a popular name.
So one can conclude that Faybla = Taybla = Tauba (diminutive).

Got it, I'll make the correction and just note the Faybla somewhere, just in case.

BTW, side note (related to a different query), but is Tauba and Toba typically the same name?

Tauba = Toba = Tova
However, Doba may be Debora = Dwojra.