List of Famous people born on October 20th

Alessandro Achillini was an Italian philosopher and physician.

Austin Flint I was an American physician. He was a founder of Buffalo Medical College, precursor to The State University of New York at Buffalo. He served as president of the American Medical Association.

Wolf Paul Barth was a German mathematician who discovered Barth surfaces and whose work on vector bundles has been important for the ADHM construction. Until 2011 Barth was working in the Department of Mathematics at the University of Erlangen-Nuremberg in Germany.

Giuseppe Pericu is an Italian politician.

Daniel Schaeffer Kemp was an American organic chemist, an emeritus professor of chemistry at the Massachusetts Institute of Technology. Kemp's work was focused on the synthesis and conformational analysis of peptides. He developed several chemical ligation strategies and methods for templating the formation of helices and sheets. The eponymous Kemp's triacid and the Kemp elimination reaction are among his developments. He was the author of an organic chemistry textbook. He died from COVID-19 during the COVID-19 pandemic in Massachusetts.