Jewish Encyclopedia Volume 5 p537 states:

Some Jews became the financial agents of the princes, and Court Jews acquired political influence with the margraves of Ansbach. The most famous of the court Jews was Elkan Frankel, son of Enoch Levi of Vienna; he was the victim of a court intrigue and of his own ambition, dragging with him in his fall his brother, the cabalist Hirsch Frankel (1712).