Jemain

 Jemain was a Minotaur who sailed on board the royal flagship Dawn Treader, in the service of King Caspian X, in 2306.

He was likely born in hiding, during the years before the War of Deliverance. Along with many other Minotaurs, he likely fought for Prince Caspian X in several battles during the war.

Practically nothing is known about him, except that he may have been a relative of Tavros, considering their strong resemblance. But even if they weren't related, they were obviously close friends, seen by how they interacted with one another in the background of the film. Of course, that could have been just because they were the only two Minotaurs in the crew.

He was also a fierce warrior, observed by how he fought in the revolt at Narrowhaven, with a battle-axe (the same as Tavros), and was a dedicated sailor to the crew.

Trivia

 * Jemain is a character created for the 2010 Fox/Walden film The Voyage of the Dawn Treader. He is played by Australian Tamati Rangi.
 * The name, Jemain, was apparently chosen by Tamati Rangi, though it was never shown in the credits.