Need Help Deciding on a Name for a Homebrew Monster

I recently homebrewed a monster meant to be a good-aligned counterpart to the death knight; they're created when a paladin's spirit feels strongly that its work isn't done and can still give more to the cause. This creature is lawful good, retains its Lay on Hands ability, can use an Armageddon Orb (force and radiant instead of fire and necrotic), etc.

However, I want to share this creature with the DDB community, and I am having a miserable time thinking of a name for this creature. The only names I could think of were "Einherjar" and "Bone Knight," both of which are already officially licensed monsters and are ineligible to share as a result. If anyone has suggestions for names, I would greatly appreciate it.

When wqgnarokkr said “unfinished business i instantly thought of Ghost Knight! Other names that came to mine were Holy Knight or Angel Knight.

You could try a name that doesn't have "knight" in it, like Eternal Guardian or something. Something more fun and evocative than Adjective Knight.

I think I'll combine your and wagnarokkr's suggestions and use a name focused on the fact that the creature has a specific mission to accomplish, while dropping the "knight" noun. Maybe Oathbound Revenant.