Jonathans are an old school apple. The origin story for it is a bit misty, but they’ve been around since at least the early 1800’s. With a relatively thicker skin, Jonathans have a nice sweet tart balance mild aromatics.
Jonagolds are a cross between Golden Delicious and Jonathon bred at the New York State Experimental Station. A little less tart than the Jonathan, its similarly sweet but comes off a little flatter.