You perhaps know this but if not the mother’s is the line Jewish family trees can be traced ,I asked at a local Synagogue which is now museum ,The Spanish and Portuguese Synagogue in Manchester ,re family history and gave the first name of a baby girl born the same date as I was ,and how I might trace her as my second name “ Viktoria” was her first name .
It was a Jewish family , I did not know her mother’s maiden name but the staff at the museum said it would be through the mother’s name that I could trace her ,that was helpful .
I just trawled through babies born the same day as I was , named Viktoria and found her ,.however her mother’s maiden name was not Jewish so her Jewish father had “ married out” .This was on F.B,M.D,where her father’s name was,and mother’s maiden name of course
Not sure how in this case the mother not being Jewish would affect Jewish records .Thank goodness for the unusual spelling!
The family later emigrated to Australia.
Just thought this might be a little helpful,.
Viktoria.