Meaning: perhaps ⲉⲛⲟ-, 'O mother!' + ⲧⲁⲛⲛⲗ̄ (meaning unknown, perhaps ⲧⲁⲛⲛⲓ-, 'his/her' + -ⲗ) = 'mother Tannil'. The element ⲉⲛⲟ- at the beginning may not be an integral part of the name, but a title 'mother', analogous to ⲡⲁⲡⲟ, 'father', attested with names of some Nubian bishops and being most probably Nubian rendering of ⲁⲃⲃⲁ.