Maxam

Further reading Angelo Macon at the Comic Book DB Angelo Macon at the Grand Comics Database

Further reading Brett Mahoney at the Comic Book DB Brett Mahoney at the Grand Comics Database

Further reading Dino Manelli at the Comic Book DB Dino Manelli at the Grand Comics Database

Further reading Melinda May at the Comic Book DB Melinda May at the Grand Comics Database

Further reading Tiny McKeever at the Comic Book DB Tiny McKeever at the Grand Comics Database

Further reading Megan McLaren at the Comic Book DB

Further reading Harold Meachum at the Comic Book DB

Further reading Joy Meachum at the Comic Book DB

First appearance	The Amazing Spider-Man #138 (November 1974)
Created by	Gerry Conway and Ross Andru
Species	Mutant
Abilities	Telepathy
Further reading Mindworm at the Comic Book DB Mindworm at the Grand Comics Database

Further reading Monkey Joe at the Comic Book DB Monkey Joe at the Grand Comics Database

M-11 is a robot. Originally known as the Human Robot, the character was given the name "M-11" in the 2006 to 2007 Agents of Atlas miniseries as an allusion to its first appearance in Menace #11 (May 1954) from Marvel Comics' 1950s predecessor, Atlas Comics. The character's five-page origin story, "I, the Robot", appeared in the science fiction/horror/crime anthology title Menace #11 (May 1954) from Marvel Comics' 1950s predecessor, Atlas Comics. In an alternate reality from mainstream Earth, a scientist's newly created robot is programmed by the scientist's greedy business manager to murder the scientist. The incomplete robot, however, continues through with his directive to "kill the man in the room", and kills the business manager when the man enters. The robot then leaves the house, programmed to "kill the man in the room".

The M-Twins (Nicole and Claudette St. Croix) are superheroine mutants who appear in the X-Men family of books. Created by writer Scott Lobdell and artist Chris Bachalo, she/they (as M) originally was a member of the teenage mutant group Generation X, and have not appeared in the series since Generation X #58. Nicole and Claudette have various telepathic abilities, including reading minds, projecting their thoughts into the minds of others, and defensively masking their minds against telepathic intrusion. They have also used telepathy offensively to limited degrees, such as mind control and memory wipes. The twins (and all their siblings) are somehow able to merge into various combinations with each other, each resulting fusion generally having a distinct personality and unique set of powers. However, the fusions can be undone by considerable trauma, typically a large explosion.

...
Wikipedia