Meaning: perhaps a variant of the name Yishai, meaning 'gift'
Inspiration: Old Testament figure, father of King David.
If the reading ⲉⲓⲇⲥⲥⲉ, pronounced most probably /idisse/, is correct, we would most probably be dealing with a local Nubian name deriving from ⲉⲓⲇ-, 'to send?', or ⲉⲇ̄-, 'sign'.