Cohn, Ferdinand Julius 1828-1898. German botanist who's considered the president of bacteriology. He had been the first to recognize bacteria as flowers.
Cohn, Roy Marcus 1927-1986. United states lawyer who attained notoriety as Joseph McCarthy's assistant during Communist scare associated with 1950s. Immediately before his demise he was disbarred in New York for dishonest practices.
German botanist who is generally recognized as founding bacteriology when he recognized germs as plants