It is a European polearm. It’s decorated with a single-edged blade at one end of the pole. The blade is similar to that of an axe head – not a straight blade or as curved as cutlasses or swords.
Some of the blades were crafted with a small hook somewhere on the blade-end of the pole. Sometimes on the opposite end of the blade. This was used to catch riders. (This is a running theme in our weapons of choice!)
The glaive was a highly rated weapon in the polearm class/other hand-to-hand combat weapons of the time. This rating occurred in 1599.