These are an Ameraucana or Easter Egger cross. Notice the comb. It should be a single straight comb on a Marans. The combs on your look half and half, straight and pea, but more pea, like an Ameraucana. Also notice the muffs---the puffy feathers on their cheeks. The combs and muffs are dead giveaways that they are crossed with Ameraucana or Easter Egger. They will lay pretty eggs, but they are not Marans. Sorry.