I'm not sure where it's most concentrated but it is common in the Western world, like in populations of Central Europe or Eastern Europe to name a few.
Also brown hair is very common apparenty in the western world
hello how are you? Okay, what color of hair do you have? If it is brown, it's the second most common after black! I have brown hair, it's pretty normal looking, unlike other variations I've seen. Are you talking about the variations like light brown or almost black? Yeah, black specifically, I wish mine was like that. I don't think there's anything about brown hair that differentiates it from others. Actually, brown hair's strands are thicker than fair hair's but red hair is even thicker. that is interesting, i wonder if men or women more commonly have darker hair Can't say although "brunette" is the feminine version of "brunet" which is a French word! That's interesting too, where can you find most brown haired people?
Brown hair is common among populations in the Western world, especially among those from Central Europe, Southeastern Europe, Eastern Europe, Southern Europe, Southern Cone, the United States, and also some populations in the Greater Middle East where it transitions smoothly into black hair.