According to the Internet source given below, Max Dreyfus was a German-born American music publisher, arranger and songwriter. Between the 1910s and 1950s he encouraged and published the work of many of the writers of the so-called Great American Songbook, and was president of Chappell & Co., Inc., the world's largest music publishing firm.
Born in Kuppenheim, Germany, he moved to the USA in 1888 and worked as a travelling salesman. In the mid-1890s he worked on Tin Pan Alley in New York City closely with Paul Dresser transcribing song arrangements. He then had a position at T.B. Harms & Co. arranging and plugging songs, He wrote his first succesful song Cupid's Garden (1901), published under the Max Eugene. Prior to that he had written a few ragtime numbers such as De Ragtime Dance (1899) published by Consolidated Music Publishing Co., Chicago, Illinois, USA.
Max and his younger brother Louis Dreyfus (1877-1967) bought the T.B. Harms shares in 1904 retaining the company name and entered into a partnership with Francis, Day & Hunter. By 1926 they had sold T.B. Harms and bought Chappel outright reconstituting their holdings as Chappell, Inc.
Max Dreyfus died in Brewster, New York.

Websites:
	Max Dreyfus	Biography by wikipedia.org.