Hazen, Marshman Williams was born on July 20, 1845 in Beverly, Massachusetts, United States. Son of Greenlief and Susan Perley (Towne) Hazen.
Bachelor of Arts, Dartmouth, 1866, later A.M. Principal Pinkerton Academy, 1866-1869, high school, West Cambridge (Arlington), Massachusetts, 1869-1873. Manager Western house of Ginn & Company, publishers, 1873-1877. Manager New England branch D. Appleton & Company, publications, 1873-1878.
Admitted to Massachusetts bar, 1882. Has practiced in New York, since 1885. President of and director in various corporations.