L. Frank Baum
Raised in Chicago, Baum was born in Aberdeen, South Dakota, on December 18, 1889, to Maud Gage and L. Frank Baum. The third son of L. Frank Baum, the author of "The Wonderful Wizard of Oz", he was named "Harry Neal Baum" to honor Harry Baum and Hattie and William Neal, L. Frank Baum's brother, sister, and brother-in-law, respectively. His brothers were Frank Joslyn, Robert Stanton, and Kenneth Gage.