Retains its original name after taming. Kurinnaxx is the first boss of the instance. It can interrupt frequently and seems to be resistant to traps, so start taming from as much distance as possible. Also, clear out any packs of roving wasps in the area as they can also interrupt your tame.
Level scaling: In Shadowlands most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.