4Martin Ohm's PhD advisor (1811 Friedrich-Alexander-Universität Erlangen-Nürnberg) was
Karl Christian von Langsdorf
Langsdorf's PhD advisor (1781 Georg-August-Universität Göttingen and Justus-Liebig-Universität Gießen and Universität Erfurt)
was Abraham Gotthelf Kastner
von Rheticus' MA advisor (1535 Martin-Luther-Universität Halle-Wittenberg) was Nicolaus Copernicus
Copernicus' Juris Dr. advisor (1499 Università di Bologna and Università degli Studi di Padova and Uniwersytet Jagiellonski and Università degli Studi di Ferrara)
was Leonhard von Dobschütz