Ameraucanas don't have feathered legs. What kind of comb does it have? Does it have extra toes? Does it have a beard/muffs? Single comb, 4 toes, and no beard/muff would be a Cochin. Pea comb, 4 toes, and no beard/muff would be a Brahma. Single comb, 5 toes, and beard/muff would be a Faverolle.
On the others, if they have single combs and yellow legs (with or without a dark wash on the front) then they should be barred Rocks. If they have a single comb with pink or white legs (with or without dark wash) then you have cuckoo Marans. If they have a rose comb then you have Dominiques.