Trell was a Trevan man of the 24th century.
Trell's father was a loyal servant to Lord Rikan, a warlord of the planet Treva, and Trell followed in his path. He served Rikan for some twenty years, even through Rikan's rebellion against President Nalavia in 2364.
He fought with Rikan when Nalavia's forces assault the warlord's castle, Warrior's Rest. Trell treated Rikan's injuries, but he was later shot during the battle. (TNG novel: Survivors)