People have asked Grok and other AI chat bots if the Greek name Ἰησοῦς is declinable. Most of them did poorly. However, Enoch answered very well:

Yes, the Greek name Ἰησοῦς is indeed declinable. It is a second-declension masculine noun, and it declines as follows:-
Nominative: Ἰησοῦς
Genitive: Ἰησοῦ
Dative: Ἰησοῦ
Accusative: Ἰησοῦν
Vocative: Ἰησοῦ

You can try Enoch at https://brighteon.ai