Considering the context, it is possible that Jesus was referring to Abraham as to what his name signifies, father of a multitude of nationalities or nations. Rather than simply be a direct descendant of Abraham as the Jews claimed.
The coming of what Abraham’s name signifies, is the opening of the door of salvation to the Gentiles.
I am the door, I am the way, I am the life, I am the resurrection, I am the truth. Etc.
Heb 11:8 - By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went.
Heb 11:9 - By faith he sojourned in the land of promise, as
in a strange country, dwelling intabernacles with Isaac and Jacob, the heirs with him of the same promise:
Heb 11:10 - For he looked for a city which hath foundations, whose builder and maker
isGod.
Heb 11:39 - And these all, having obtained a good report through faith, received not the promise:
Heb 11:40 - God having provided some better thing for us, that they without us should not be made perfect.
Being made perfect refers to being raised immortal. And the city whose builder and maker is God refers to the New Jerusalem which is the body of Christ.
When Abraham and all of like faith as he are made perfect by resurrection they will come together with Christ as the body of Christ and be the New Jerusalem which is to come.