I agree, both parents are mixed breeds. However, I think it's more likely there's Easter Egger in them than actual Ameraucana. No matter what, though, they sure did produce stunning offspring!
You asked what breeds they are. And they are crossbreds "likely not even first generations crossbreds". Determining exactly what crosses they are is nearly impossible. Anything other than calling them crossbreds is just guessing. There is no way to know, with 100% certainty, what their ancestry is. Sorry its not the answer you wanted, but facts are facts.