Now I think the cockerel might be a Rhode Island Blue. (I had made assumptions about how the males would look, but then I looked them up to check. There's a male pictured on the Mt. Healthy hatchery website that looks pretty similar to me.)
Pictures 1 and 3 are your "Ameraucanas" (actually Easter Eggers.)
I think 2 and 5 are your Welsummers.
4 is either Black Australorp or Noir Marans, but I'm not sure which.
I can't see the comb or legs on the cockerel, but I'm leaning toward him being either Welsummer or Easter Egger.
Since you...
If the hatchery called them Americanas, they are probably Easter Eggers.
There is a breed called Ameraucana (note the slightly different spelling), but most Easter Eggers do not properly fit the description of that breed. They are usually not the "right" colors, and may also have other...