This one is difficult> The hilt is Yemeni which locals call
Zraf Yemeni. It is old Rhino from a Yemeni Jambia with all original silver Yemeni silver furniture> It is an old hilt likely to be an heirloom. The man wearing it has a different pattern on his white Dishdash ...which is from the UAE. The scabbard is deeply cut/patterned on plate silver (not silver stitched).
I think this is a UAE Khanjar.