I came across this painting last night;
It's by an Italian painter called Gentile da Fabriano and dates to the early 15th century. The image is said to depict Jesus, the Virgin Mary and John the Evangelist. All three characters look pretty ginger to me, however I suppose the colouring could be said to be more blonde than red. It's difficult to tell with these old paintings - the decay of the image and the lighting conditions when the photograph was taken no doubt having some influence. I think I'll plump for strawberry-blonde.