The name is definitely not Nubian. It can perhaps be compared with such Iochamir and Shurahbil/Serabel, which makes it possibly a South Arabian import (pers. comm. N. Vanthieghem).
Otherwise, it could be a Blemmyan name, as suggested by the element ⲓⲱ-, as ⲓⲟⲩ- is the marker of nominative singular in Old Bedauye.