We suspect this composer is Joseph Amasa Munk (JAM) (1847–1927), who is buried in the Angelus Rosedale Cemetery, Los Angeles, California.
Rationale:
JAM was born in Knox Township, Ohio, about 50 miles from Cleveland, where Good Night was published in 1890.
Both JAM and J. A. Munk were doctors.
JAM was a known composer, and published a book of religious vocal music: Musical Compositions of Joseph Amasa Munk (Los Angeles, California: 1916)