Welcome John. You certainly have a great pond, stream, fish and plants. They look very well cared for.
As for naming your lilies, I had the same problem and the professionals will not try to identify lilies from pictures. I'm not an professional either, just had that experience. I asked and noone would say because they said that is how lilies begin to be passed around with the wrong title on them. The professional lily growers need to be sure what they have on their hands when they are cross breeding them. But of course mine will never make it to the home of a breeder. Some times I think that people are showing off (just a little) when they spout the names of their lilies. I personally don't care what their names are as long as they are pretty and blossom well.