I always thought the image looked like a Viking.
But we know from the Bible he looked like the average person in his time and place. So devoid of any outstanding features that no one could give a description to the Romans good enough to distinguish him from any one of thousands of other men in the area.
He wasn't the only blond, blue-eyed, sunburned viking within a hundred miles.
He had to be betrayed in person.
How do we know what a Viking looked like? Some claim its Jacques De Molay. . . but there was nothing left of Jacques except a burned corpse, if that.