Retains its original name after taming. Banescale occasionally spawns immediately after Siltstalker the Packmother has been killed (but definitely not all the time). He appears on the path to the left of her location (when facing towards her), in south-east Nar'anan. He's tameable at level 120 despite being level 121.
*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.