Desolous

Desolous was a Sith Lord who was active in the galaxy long before the year 35 ABY. The Sith Eternal cult, which was active during that time, had a custom of naming their Sith trooper detachments after ancient Sith. The Desolous Legion was thus named after them—a name whose true significance remained a mystery to those outside of the cult.

Text and facts from the “Desolous” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.