Reginald De Koven[?]
Rudolf Friml[?]
Victor Herbert
Emmerich Kalman[?], also known as Imre Kálmán
Franz Lehar
Jacques Offenbach
Sigmund Romberg[?]
Johann Strauss II
Arthur S. Sullivan (of Gilbert and Sullivan)
... the theme vowel, is inserted between the stem and the ending. This serves to make the thematic verbs generally more well-behaved. Exponents utilized in verb conjugation ...