ColonelHardisson said:
Fingolfin was also blonde. His mother was a Vanya.
His mother was a vanya, right enough. But can you cite a statement by Tolkien that Fingolfin himself was blond?
Not every son of a blonde is blond, and 'The Silmarillion' does say that the House of Finarfin "alone among the princes of the Noldor" were blond.
Regards,
Agback