Abrom

From Memory Alpha, the free Star Trek reference.

Abrom was a Zeon, who lived and worked on neighboring planet Ekos. Abrom was sent to Ekos in an attempt to civilize them.

In the 2260s, a Federation cultural observer named John Gill, as an experiment, tampered with the evolution of the Ekosian species by introducing a Nazi-themed concept of force and the state, causing the ruling regime to unite their people under a banner of anti-Zeon sentiment. When the Ekosian Nazis began putting Zeons to death, many banded together in an underground, which Abrom and his brother Isak were members of. Abrom and Isak helped a landing party from a Federation starship locate Gill, and decapitate his oppressive government before a full scale invasion of Zeon began. (TOS: "Patterns of Force")

Abrom was played by actor William Wintersole.