Leonhard Wilhelm Johann Neuman (also Noiman; pseudonym Leenart Helisalu;[1] December 7, 1885 – October 20, 1933)[2] was an Estonian musician, choir director, singer, and diplomat.
He also studied harmony with Rudolf Tobias at the Royal Music Institute of Berlin.
Neuman was a music teacher in schools in Pärnu and Tartu in from 1914 to 1915 and from 1916 to 1918, the head of the press agency of the Estonian Ministry of Foreign Affairs in 1919,[4] a teacher in Tallinn and Tartu music colleges from 1919 to 1921, and Estonia's diplomatic representative to Rome from 1921 to 1922.
He contributed to reference works, including the collection Viron-Kirja (Helsinki, 1926) and Estonia (Brussels, 1930).
[3] Neuman married the soprano Pauline "Paula" Elisabeth Puusepp (1896–1944).