Quite a lot Jewish people were influential in mathematics in Romania.

https://en.m.wikipedia.org/wiki/Leon_Birnbaum

https://en.m.wikipedia.org/wiki/David_Emmanuel_(mathematicia...

https://en.m.wikipedia.org/wiki/David_Emmanuel_(mathematicia...

https://en.m.wikipedia.org/wiki/Meinhard_E._Mayer

https://en.m.wikipedia.org/wiki/Isaac_Jacob_Schoenberg

And many others.

My grandfather who become a math teacher eventually had a Jewish math teacher. So was my grandmother's brother, he had lots of Jewish math teachers.

Unfortunately things become bad during ww2, but before that Jews were overly represented into teaching math.