hehehe--There is a USDA growing restriction or a Marketing Order on where the onions can be planted. Outside of that growing area they can't be labeled "Genuine Walla Walla Sweets'.
https://www.sweetonions.org/marketing-order.html
So in your case they Would be Minnesota Sweets.
I believe that Tc calls his 'Gorilla Sweets'.
If you look at Burbee's seed catalogue for instance you'll find that they offer 'Walla Walla Sweets-seeds' NOT GENUINE Walla Walla Sweet-seeds.