@KiwiPlantGuy - Charles,
There are so many thousands of cultivars of azalea, that once the provenance is lost, (lost tag), there is no way to figure out with certainty from photos what cultivars you might have. If you know your the nurseries you purchased from, and they still have inventory lists for the years you purchased, you can narrow your "lists of suspects" to cultivars they carried.
We can all make "pretty good guesses", but they will never be better than guesses. That is the problem with loosing tags, loosing the provenance of our plants. Be they azalea, camellia, orchids, or any other collectable botanical. There are simply too many hybrids out there. I have my own collection of "no tag, lost tag" azalea, orchids & others. One I know is an awarded orchid that hasn't been "cloned" yet, which means it could be worth serious money, but I don't have the tag, so it is worth no more than the $10 grocery store Phal.