Cosmic Man
Cosmic Man (Rokk Krinn: Adult Legion timeline) appears in 11 issues in grailworth's catalog, and was first published in 1961. First appearance: Superman #147 (1939), cover dated 1961.
First appearance
Every appearance we value
Action Comics (1938) 1 issue
Adventure Comics (1938) 2 issues
Legion of Super-Heroes (1989) 1 issue
Superman (1939) 2 issues
Superman / Batman (2003) 1 issue
World's Finest Comics (1941) 2 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.