Carried during the 1600s and 1700s, this Windlass The English Cutlass Pirate Hanger Sword has a tough, tempered high carbon steel blade and a solid brass heart-shaped guard characteristic of the period.
Historical cutlasses are a good place to start
One Eyed Curly
Master
Fasinating idea! I'd suspect that you'd want to get one that is as long as possible that you could comfortably wear, probably in a hip mounted scabbard (as opposed to back mounted). Youtubers like Shadiversity are full of knowledge on these kinds of things.