Debra, thanks for telling me how to do that search!
As I thought, the only Keppel on my list (on order) is 'Wintry Sky'.
'Arctic Express' pops up on that search, but that is because Keppel introduced the plant; the hybridizer was Joseph Gatty. (This is one of the pair of irises that I am trying to beat the
Stachys off of...)
Now, if we're talking
wants... well that could take a while to sort out...