Nomad is Jack Monroe, who was formerly known as the third Bucky. He was created by writer Steve Englehart and artist Sal Buscema in Captain America #153 (September, 1972).
A character with a complicated history, Monroe's origin involves a complex series of retcons (a comic book term for changes to previously established canon). Although the character's first real appearance is as "Bucky" in Captain America #153, the origin of the character, first revealed in Captain America #155 (again by Englehart and Buscema), identifies him as the "Bucky" that appeared in Captain America comics which were originally published in the 1950s.
great job though