There are 3 artists with this name, 1. Experimental artist Louis Hardin, 2. A project of Walter Schreifels, 3. A short lived band fronted by James Freud formerly of Models.
1) Moondog was the pseudonym of Louis T. Hardin (May 26, 1916 – September 8, 1999). Hardin was a blind New York City street musician, influential composer and former beat poet. From the late 1940s until 1974, he was a permanent fixture on 54th Street and 6th Avenue in Manhattan