In 1994, the Music Educators National Conference (MENC) placed Leonhard's name alongside those of William Billings, Lowell Mason, Frances Elliot Clark, Karl Gehrkens, Mabelle Glenn, James Mursell, Lilla Belle Pitts, and Allen Britton in the MENC Hall of Fame.
Charles Darwin | Charles Dickens | Charles, Prince of Wales | Ray Charles | Charles II of England | Charles I of England | Charles Lindbergh | Charles de Gaulle | Charles II | Charles | Charles I | Prince Charles | Charles V | Charles Scribner's Sons | Charles Aznavour | Charles University in Prague | Charles Stanley | Charles Bukowski | Charles Mingus | Charles Ives | Charles Bronson | Charles Babbage | Charles III of Spain | Charles Cornwallis, 1st Marquess Cornwallis | Leonhard Euler | Charles Baudelaire | Charles Sanders Peirce | Charles River | Charles Manson | Charles Laughton |