"Kalonymus" redirects here. For the defunct plant genus Kalonymus (Beck) Prokh., see Euonymus.
Kalonymos or Kalonymus (Hebrew: קָלוֹנִימוּסQālōnīmūs) is a Jewish family originating from Lucca and Rome. After settling in Mainz and Speyer, the family became prominent in the development of Jewish learning in Germany.