Name: Suzanne/Sue Sebastopol, CA (Zone 9a) Sunset Zone 15
Unless you have a purchased list somewhere for reference, I agree with Sue, with over 87,000 registered daylilies, it may be next to impossible to ever get a correct ID it.
If that is a first bloom in your garden on this plant, don't be surprised you can't recognize it. It is amazing how different a first bloom on some daylilies can look, even several early blooms sometimes don't look much like the final product will.