No, I don’t ‘got’ to be kidding. I’m talking first hand family experience here. Not one redhead in the bunch or left back in Poland. Do you know the Polish population in and around Pittsburgh? Lots. No redheads that I’ve ever seen. Blondes yes.
I knew a girl in School who was Polish and had red hair
(real knockout).
There are red-headed Italians and Russians and even some Pharoahs in Egypt appear to have had red hair.
Its most common in northern and northeastern Europe, but other populations also have the gene. If its by conquest or immigration, I have no idea. But its there.