The second MLF were actually anti-mutant activists posing as evil mutants to ensure bad blood between humans and mutants. The first Deadeye was shot through the chest by the X-Cutioner's psi-lance. The second Deadeye was killed by the Punisher with a bazooka.
Deadeye I was a Moon Knight character.
The Deadeyes' real names were only revealed in the Handbooks.