I lost a Giant Beetle when I was telestormed as a ghost from Trinsic to Cove, in an invasion sometime in the AoS/SE era on Lake Austin. Not being able to find it (it had died and my body had decayed before I could return, and my control slots dropped to zero), I had my guildmates at the time tame me another that I give the same name.
Skip forward to after the release of ML, and my new guildmates (my old guild had left UO for Guild Wars) call me and tell me they see my beetle in Cove. This is strange, because was ON my beetle at the time.
I go to Cove, and sure enough, I see my beetle's name on the edge of the screen, on top the mountain behind Cove. I call "All follow me", and suddenly I have a beetle ghost beside me, and my control slots read 6/5. I had one of my guildies rez it, then I passed it off to them for long enough to change characters. I then took ownership of the long-lost beetle that had spent about 2 years as a ghost in Cove on my mage, and I've had it ever since (only releasing it and retame it with the taming changes to drop it to 1 slot, so I could now cast 2 EVs or EEs while I have it out)