In my case, Scandinavian and also English should be proxy for German ancestry, which I have.
Not sure for Jewish. I score it only on Myheritage (5-6%). I don't get it anywhere else.
My mother taught her German side was mixed with Jews, but I can't find any proof for that.
For you, Scandinavian may be some conqueror ancestry. Hungarian conquerors has Scandinavian admixture from Germanic tribes.
Jewish, well, many Jews lived in eastern Europe. Do you have full Jewish matches? All Jews are closely related people, so you should have many if you have genuine Jewish ancestry.