Martian (Adventure Time)

The Martians are a species of humanoid beings found on the red planet Mars and there magical humanoid aliens.

Biology
These humanoid Aliens display characteristics uncommon in humans, such as magical abilities, some even having the power to grant immortality, though they can also take each other's powers away. A few Mars even have God-like abilities, such as Glob, Grob, Gob, Grod.

Culture
It would seem most Martian civilians are named after their occupation, followed by "Man".