L. Jenkins

L. Jenkins is the name of a Marine in a piece of gallery art in the Halo Graphic Novel. He is depicted ducking to avoid a thrown Plasma Grenade, alongside two other Marines.

Trivia
Or he could be PFC Jenkens brother or reletive.
 * He is likely named after Leroy Jenkins, a character in a popular World of Warcraft clip on the net. In the clip, Leroy messes up a carefully planned strategy by charging straight at the enemies, getting his party killed.