Amda Seyon invaded Ifat in the 14th century and fought Harla. No mention of Simur, so they were probably not in the north until the 15th century. We know Hawiye was confirmed in the south (Merca) by the Arab travellor in the 12th or 13th century. The saamale invaded and assimilated clans in ifat empire much like what the German nomads did to the roman empire.
we wuz Romans yo