That flying ghost thing teleports you up into a cage when you aggro it.
Bone 1 should be there.
Then we also had two bones in the left room and another bone in the right room ( 2, 3 and 4 )
All bones respawn!
The ghost also respawns.
So actually every person in group can collect all bones, accordingly you can spawn the named up to 6 times. No clue if thats intended.
Try not to kill that ghost thing, makes it easier for the group to get the bones without waiting for repop.
Anyway theres only one named and we had only "Treasure Chest"!!!

It was a waste of time, but fun. Anyone got ornate or exquisite chests?