Most of the idea of Guénon on the polar origin and the races/castes have been written under the name of 'Palingénius' in 'L'Archeomètre' on the magazine 'La Gnose', 1910-12, when he was very young. Differently from Evola, he thought oddly that before came the castes and only after the races, quoting also the four rivers of the terrestrial paradise as parallel.
The quotation of Tilak about Hyperborea as Vedic Home is correct, naturally, and about the races, Guénon had strange ideas too, saying the Japanese are not exactly a yellow race ('Orient et Occident'), or writing something not nice about the Jewish influence but under the pseudonym of 'Sphynx' in "Réflections à propos du Pouvoir Occulte", La France antimaçonnique n.24-25, 1914. Growing old, he preferred to avoid these matters.
I too do not think that Evola has been influenced by Blawatsky or even Reghini...like I seem to remember also a R. Berkeley more loquacious than now suspected time ago, but anyway the juvenile experiences are only stages. Guénon wrote juvenile poems entitled 'Baal Zeboud, Samael, Litanies du Dieu Noir', etc...but nobody thinks he has been influenced by the Satanism.