Regarding white Henryi and Lady Alice - the difference to the eye seems negligible, I think each was registered separately. There's probably a why to check their heritage
@pardalinum may be able to help on that subject. I had Lady Alice for years, it was one of my favorites. Lady Ann, I don't know of, Lady Anne I do know of, the latter is an orangey/yellow trumpet lily bred (I think) by Lisa Hunt (aka Buggy Crazy).