Ghost in different languages.
https://www.indifferentlanguages.com/words/ghost
Not sure if that is the way you want to go, but thought it was a cool link.
All my snake names are from from other languages except for Figment.
He is purple so I named him after the old Imagination Ride dragon, Figment, from Epcot center.
You can be clever or meaningful, but he might just be a Joe. You never know. You’ll have to decide when you meet him.