Yale University's alumni includes many presidents.
Kenneth Charles Burns -LRB- March 10 , 1920 -- February 4 , 1989 -RRB- was an American country musician , comedian , and mandolin player .. country. country music. American. United States of America. mandolin. mandolin. He was better known by his stage name Jethro from his years with Henry D. Haynes as part of the comedic musical duo Homer and Jethro beginning in 1936 .. Homer and Jethro. Homer and Jethro. Henry D. Haynes. Henry D. Haynes