I begin to sing of Pallas Athene, the glorious goddess, blue-eyed, inventive, unbending of heart, pure virgin, saviour of cities, courageous, Tritogeneia. From his awful head wise Zeus himself bore her arrayed in warlike arms of flashing gold, and awe seized all the gods as they gazed. But Athena sprang quickly from the immortal head and stood before Zeus who holds the aegis, shaking a sharp spear: great Olympus began to reel horribly at the might of the bright-eyed goddess, and earth round about cried fearfully, and the sea was moved and tossed with dark waves, while foam burst forth suddenly: the bright Son of Hyperion stopped his swift-footed horses a long while, until the maiden Pallas Athene had stripped the heavenly armour from her immortal shoulders. And wise Zeus was glad.
Homeric Hymn XXVIII.

Transl.: A new reconstruction of a woman of the Fatyanovo culture. The Fatyanovo culture is ancestral to the Indo-Iranians (Aryans), who conquered India and Iran, lived on the territory of modern Russia and were genetically close to modern northern Europeans.

The summary of this is that Blondism arose on the Mammoth Steppes of Eurasia (probably northern Siberia AKA Hyperborea), and came to Indo-Europeans via their considerable Ancient North Eurasian ancestry.