Oscar Ferdinand Telgmann (ca. 1855 – 30 March 1946) was a German-Canadian composer of operettas, conductor and educator, and violinist best known for his operetta Leo, the Royal Cadet. == Early life == Telgmann was born in Mengeringhausen (now part of Bad Arolsen), Principality of Waldeck and Pyrmont to Jean Ferdinand Telgmann and Dorette Margaret Leonhardti. In 1863, at age 6 emigrated with his parents to Kingston, Ontario via New York. He began his...