Director of M.A. Hanna & Company, a coal and iron ore shipping concern started by his father, and uncles. Hanna was a major philanthropist in Cleveland, donating over $90 million to Cleveland's cultural and charitable institutions. Hanna was an avid art collector and a trustee and principal benefactor of the Cleveland Museum of Art, but also supported the Cleveland Playhouse, University Hospitals, Karamu House and others.
From the description of Financial ledgers, 1919-1954. (Rhinelander District Library). WorldCat record id: 22645427
Leonard C. Hanna, Jr. (1889-1957) was the director of M. A. Hanna and Company, a major philanthropist in Cleveland, Ohio, and the nephew of businessman and politician, Marcus A. Hanna. A graduate of Yale and a first lieutenant in World War I, Hanna joined the family business in 1917. He was an avid art collector and became a trustee of the fledgling Cleveland Museum of Art in 1920, to which he became a principal benefactor. Hanna supported the Cleveland Playhouse, University Hospitals, and the Karamu House, among other local institutions. During his life, he donated over $90 million to cultural and charitable institutions in the Cleveland area.
click here to view the Encyclopedia of Cleveland History entry for Leonard C. Hanna, Jr.
From the guide to the Leonard C. Hanna Financial Ledgers, 1919-1954, (Western Reserve Historical Society)