Red hair only occurs in less than 2% of the human population. None of my family has red hair.
No one in my family has red hair either. Is it true northern Europeans have the most red hair?
It is true that people of northern or western Europe have a higher occurrence of people with red hair.
I wonder how that came to be. Perhaps they had an evolutionary advantage of having red hair.
Apparently it's a genetic thing where people with two copies of a recessive allele on a certain chromosome produces a different version of the MC1R protein which must produce red hair.
Oh, I see. That explains the relative rarity of gingers. It does seem that redhead families all have red hair.
It's also common for those with red hair to have fair skin, light eye colors, and freckles. 
I have noticed that as well. A paler complexion often accompanies redheads.