The apple previously sold around here as "Early Jonagold" is really called "Autumn Crisp."
There's a farmer in Concord, Massachusetts who likes to grow apples so cutting-edge they have numbers instead of names.
So, he gives them unofficial names, some of which are quite clever.
This is a smart and helpful thing to do, since it makes it easier for folks like us remember something that we especially liked.
But one of these apples—NY 674, sold in Concord as "Early Jonagold," has officially been "Autumn Crisp" since 2009. No nickname required.
It is a Golden Delicious x Monroe cross.
I'm making appropriate changes to my review.
P.S.: Despite the nickname, Autumn Crisp is not especially Jonagold-like.