Cosmo the Merry Martian was created in 1958.
The Martian was created in 1898.
Cosmo Cosmolino was created in 1992.
Cosmo Kramer was created in 1989.
Cosmo's Factory was created in 1970.
The Martian Sphinx was created in 1965.
The Martian Chronicles was created in 1950.
The Martian Child was created in 1994.
Miss Martian was created in 2006.
Martian Memorandum was created in 1991.
Martian Heartache was created in 1992.
Martian Manhunter was created in 1955.
SegaSonic Cosmo Fighter was created in 1991.