Should this be renamed?
Topic on Talk:Xanatos Gambit
It's not. You're thinking of Thanatos with a Θ, not a Χ.
The trope is named after David Xanatos of Gargoyles.
Wikipedia says "Thanatos / Xanatos" is one of those "po-tay-toe / po-tah-toe" things...
More importantly, should we be expecting everybody to know of a character from (...goes and looks...) a TV series that went off the air two decades ago?
Yeah, but Thanatos and Xanatos are different on this wiki. For instance, Xanatos Gambit and Thanatos Gambit are entirely different tropes.