The Devaronian species can be chosen as a vendor species by a trader with the Hiring II skill. Since Game Update 8, Devaronian vendors no longer accept hats or head gear.
Star Wars LoreEdit
Devaronians were a horned humanoid species from the world of Devaron in the Expansion Region, a planet of low mountains and deep valleys linked by thousands of rivers. It is believed that they were descended from a race of primates that lived in the mountains of Devaron, and that their horns were a genetic mutation that proved useful in fending off predatory birds.
Devaronian on Wookieepedia