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I don’t know where you are based but I can tell you that in much of the English-speaking world the word “Jew” itself has quite problematic undertones. These days, you would usually speak of Jewish people/persons or say that someone is Jewish. In addition to that, using Jewish people as a stand-in for frugality is pretty offensive as this is a stereotype often used to discriminate against the Jewish population. For both reasons, I would strongly discourage you from using it as part of your business name and also reconsider if that is a nickname you want to continue using for yourself.