| Adam Eterno | |
|---|---|
 Adam Eterno on the cover to the 1972 Lion and Thunder Holiday Special. | |
| Character information | |
| First appearance | Thunder October 17, 1970 (October 1970) |
| Created by | Jack Le Grand Tom Tully |
| In-story information | |
| Full name | Adam Eterno |
| Species | Enhanced human |
| Place of origin | Earth |
| Abilities | Immortality Near-invulnerability Enhanced strength |
| Publication information | |
| Publisher | Fleetway Publications |
| Schedule | Weekly |
| Title(s) | Thunder (1970-1971) Lion (1971-1974) Valiant (1974-1976) |
| Publication date | October 1970 – October 1976 |
| Creative team | |
| Writer(s) | Tom Tully Ted Cowan Donne Avenell Scott Goodall |
| Artist(s) | Tom Kerr Francisco Solano López Eric Bradbury Joe Colquhoun John Catchpole Colin Page Carlos Cruz |
Adam Eterno is a fictional British comic book superhero who has appeared in comics published by Fleetway Publications and, since 2018, Rebellion Developments. The character was created by Jack Le Grand and Tom Tully, debuting in the first issue of Thunder in October 1970.