Wilhem Walter Rudolph Max Seelmann-Eggebert (17 April 1915 – 19 July 1988) was a German radiochemist.
He was a student of Otto Hahn at the Kaiser Wilhelm Institute for Chemistry, where, after 1939, he worked with Fritz Strassmann on nuclear fission.
Later he created the radiochemistry group at the Buenos Aires University and at the National Atomic Energy Commission, working together with other notable pioneers of radiochemistry, such as Sara Abecasis, Gregorio Baro, Juan Flegenheimer, Jaime Pahissa-Campá, María Cristina Palcos, Enzo Ricci, Renato Radicella, Plinio Rey, Josefina Rodríguez, and Maela Viirsoo, just to mention a few.
In 1955, Otto Hahn invited him to come back to Germany for the reconstruction of radiochemistry studies in the country.
In 1958, together with Gerda Pfennig, he edited the first "Karlsruher Nuklidkarte" which has become a basic element both for nuclear scientists and education.