The tsakiib chuva and its variants were a common type of blade weapon used by the Austreydians during the course of over 1000 years. "Chuva" ("long") refers to the unusually long shaft, turning the sword into a polearm. This was the preferred variant as it was also used for hunting.
The design is based off of a sketch I found online a long time ago. Sadly I can no longer find the website. It's possible it no longer exists.
Check out the Artstation post for more info: https://www.artstation.com/artwork/aGOBJ9