Hi,
it really is a legitimate form, very probably comming from Ogaden and most probably from (or bordering) Harar region (I saw one in Harar, too). On
www.ezakwantu.com it is labeled as Somali Danakil, which partially coincide with northern Ogaden. Regards, Martin (P.S. If I succeed to come home for a Christmmas, I will send you pictures, as I bought those daggers)