Kromm
Kromm (DC) appears in 4 issues in grailworth's catalog, and was first published in 1961. First appearance: Justice League of America #3 (1960), cover dated 1961.
First appearance
Every appearance we value
Justice League of America (1960) 2 issues
Mystery in Space (1951) 1 issue
Showcase (1956) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.