The Kilij is perhaps the progenitor of most curved swords. Early forms date back to Turks in central Asia as early as 300BCE. Kilij are a curved sword with a partially sharpened back/false edge (called a yelman).
This model is based on forms common to the Late Middle Ages, and has a hook handle, and star crossguard. Vlad Tepes, AKA Vlad the Impaler wielded a Kilij of this type.