Named devil
From HGWiki
There are a profusion of named devils in the Hells. Typically, these carry an Energy Matrix, which opens a barrier or door on the same map the devil is found on.
Named devils are always at least paragons, and can elevate to Superiors, Elites, and even super-Elites depending on the number of demi ranks in the party.
Named devils may occasionally have special abilities that normal devils of their type do not. For example, named Gelugons have area-wide kickback, and Gazra has an entire suite of abilities not possessed by normal Pit Fiends.