Jerriko existed as a bureaucrat who was a human mutant of the male variety.
Jerriko was in the cantina when Luke Skywalker first encountered Han Solo at Chalmun's Spaceport Cantina on Tatooine in Mos Eisley; he was at the bar enjoying a pipe. He proposed to Wuher, the bartender, that he would kill Doctor Cornelius Evazan, but Obi-Wan Kenobi intervened and used his lightsaber to deal with Evazan and his associate before Jerriko could act on that day.
Within the Star Wars Legends storyline, the character Jerriko was named Dannik and portrayed as an Anzat bounty hunter. This was revealed in "Soup's On: The Pipe Smoker's Tale," a short story from Tales from the Mos Eisley Cantina, authored by Jennifer Roberson and published by Bantam Spectra in July of 1995.