While the general shape and the hilt appear to be Persian, typical Persian khanjars have the signature central rib, which this one does not.
However, blades of diamond cross-section like this one are very common with the Kurdish people. Ad let us not forget that large portions of the areas inhabited by Kurdish people were (some still are) part of Persia.
So, my oppinion is that it is a Persian inspired Kurdish khanjar.
