we got this bird as a present. The giver had no clue what she was. We thought it was a hen till she challenged our new rooster & flared out her neck feathers. here are a couple of pictures of him/her.
Since they are young, about the same age, and the hormones haven't kicked in yet, put them all together now. You'll need at least 10 to 15 hens for two young males though. If you don't have room for that many girls, you'll have to pick one boy or the other. It can be a lot of stress on a small group of pullets when they are constantly having to dodge teenage boys.
That one hen will be at serious risk of injury from over breeding. Sometimes keeping one hen and one rooster together works out fine, but it is a very rare occurrence. A young cockerel is all hormones and will want to mate many, many times a day. Unless you have at least 8 hens, there can be overbreeding. Roosters over 1 and half are more mature and don't breed as often, so fewer hens are needed.
If you are dead set on keeping all the roosters, keep the roosters all together in one coop, and all the hens in another. The roosters should not be able to see the hens, or they will be more likely to fight.