Contact your local coopertive extension , or Farm Bureau and see if you can contact their orchard specialist.
They will generally suggest you bring in 3-5 specimans typical size and color of those on the tree, and they can generally tell you the variety or cultiver .
Thank you for the advice. We actually have a ton of trees on our property producing different kinds of nuts we don’t recognize. I could keep a person very busy trying to identify plants/trees at our new place. I didn’t even think about that! You all are so helpful!