They look like Easter Eggers and/or Ameraucana-type crosses. Definitely crossbreeds, I'd say. White eggs confuse me, though. Could be leghorn or another white egg laying breed as the mother and an Easter Egger as the father.
I have some of those..lol Got eggs from ebay. They were a cross between White Crested Black Polish roo and several breed hens. Some have crests, some don't. Some have muffs others do not. Weird looking chickens!
Here's a newer picture of mu Roo "Doorman" When he was hatching he had a little flap on his shell that he would push out and then close like a little door. He did that for about 30 minutes! Here's some more pics of his sisters
One more of Doorman to show him off, My husband says he's obsessed with me he follows me everywhere!!