If there is something characteristic of the northern spirit, it is the extraordinary vigor that courses through it. . . . Ever again, the Indo-German… - Jakob Wilhelm Hauer

Even today one finds overall in the realm of the Indo-Aryans and their anthropological and geographical surroundings blond and blue-eyed types, so that we may assume that the dark-haired and dark-eyed ‘north Indians’ became darker partly under the influence of the climate [and] partly through admixture with the dark-skinned pre-Aryan inhabitants of ancient India.

Today, it is considered settled that the racial traits of the Indo-Aryans link them historically to that race which has had the definitive influence in the Indo-Germanic world, the northern [race].

So much at least is clear, that Indo-Arya remained extensively under the influence of northern blood and stands even today, albeit in pronounced admixture with non-Aryan elements.