If you are asking about my hens and cockerels- Millbrook is not related to any for sure.
The others- I bought 18 eggs (12/6)from 2 backyard breeders. At lockdown I had 2 from one breeder and 8 from another. I think FireStorm and both hens(pullets) are from the same lady, but can't be sure, , and I am assuming she only had 1 rooster, but that is just an assumption. I could contact her I still have her number. Is it important?
The pullets certainly don't seem related, to my eye.
can you post pics of millbrook and the other boys?
your girls need a colourful boy for sure.