Thank you, Vickie. (I have a cousin named Vickie!) I am trying to keep the seedling alive, and I hope to make a few crosses with it, this coming season.
When I first started collecting daylilies (decades ago), I wasn't rigorous about recording purchases on the computer. I trusted to the labels in the pots (or ground), and I soon learned the folly of that. To this day I have a daylily which I am about 95-99% certain is 'Little Rainbow'. It is miniature daylily (I am not into minis, generally speaking) and it is a polychrome, and my memories are that I had read about 'Little Rainbow' in the Daylily Journal, and when I came upon it in the nursery, I leapt on it. It really is pretty, I would have had no other reason to get it other than the name/reputation/polychrome (remember, I don't care for minis), but there will always be some small amount of doubt... so much so, that I bought it again on the Lily Auction this last fall. (Alas, that df is still sitting in a soaking tub... I hope that I didn't kill it.
)
At any event, I did try contacting the nursery (a couple of years after my purchase) to see if that was what the plant was, but I never got a response.
So what I currently have may always be "possibly 'Little Rainbow'". (In other words, you were lucky that you were able to get your daylily names after the fact!)