you did! If the berries are good, and the tree is hardy to your location, that’s what matters most, as many cultivar-hoarders could attest-- there will always be totally different cultivars of the same name, and there will be totally similar cultivars with different aliases
even possible it may have been obtained from a yet unnamed seedling of wellington parentage.
I’m also hoping Kokuso turns out to be something better than average. I have a graft and my buddy has several and we got to try the fruit this year. It was nothing special. It was easily agreeable between us. I’m hoping with age the fruit will become better.
Kokuso has the same flavor as 9 out of 10 wild alba seedlings here. Age certainly could be a benefactor for Kokuso or so I hope it is.
I have a tree purchased as ‘Wellington’ from some PNW nursery (may have been OGW) 25 years ago. It’s an albaXrubra hybrid… and the sorriest one I’ve grown. We don’t even bother picking from it… and the birds don’t even like it all that well.
Chris Homanics sent me ‘Boyleston Everbearing’ scions this spring… another variety name with ‘-ton’ at the end.