Gorck
Prince of Dorkness
Also, Hoopak in Dragonlance.Wooden or bone weapons for ancient world settings?
Firearms for renaissance?
Gladitorial weapons for arena combat.
I see your point, all those could be in one big list, but I feel there is some design space for mundane equipment that would be nothing but filler in a standard campaign to be presented in a specific campaign setting book.
I don't see that is a mainstream PHB weapon, but it certainly would be setting specific.