Rudolf Oskar Robert Williams Geiger was a German meteorologist and climatologist. He was the son of Indologist Wilhelm Geiger and the brother of physicist Hans Geiger. He worked with Wladimir Köppen on climatology, hence the Köppen–Geiger climate... Wikipedia
Born: August 24, 1894, Erlangen, Germany
Died: January 22, 1981 (age 86 years), Munich, Germany
Parents: Wilhelm Geiger
Books: The climate near the ground