Jonas Kaufmann | Walter Kaufmann | Kaufmann's | Walter Kaufmann (philosopher) | Andy Kaufmann | Theodore Kaufmann | Mike Kaufmann | Maurice Kaufmann | Kaufmann Desert House | Kaufmann | Gordon Kaufmann | Frank Kaufmann | Felix Kaufmann | Emil Kaufmann | David Kaufmann | Arthur Kaufmann |
H. Grätz, Harkavy, and D. Kaufmann claim that he, with the other three scholars, came from Babylonia, while S.J. Rapoport, I.H. Weiss, and Isaac Halévy give Italy as his birthplace.
Editor-in-chief of the project is Patricia A. (Trish) Kaufmann of Lincoln, Delaware who is responsible for collecting philatelic inputs for the catalog update from members as well as non-members.