Yer-Sub, the sacred earth-water of Turkic tradition, and Etugen, the Mongolian earth goddess, represent the same veneration of the terrestrial world beneath the Eternal Sky — the holy ground and living waters that sustain the steppe peoples, invoked alongside Tengri in both traditions.
⚠ The Turkic Yer-Sub explicitly compounds earth and water, while the Mongolian Etugen emphasizes earth primarily; some scholars treat them as cognates of the same pan-steppe earth spirit, others as related but distinct concepts.
The Orkhon inscriptions invoke Tengri above and Yer-Sub below as the twin sacred powers that legitimize Turkic rule — the Eternal Sky granting kut from above while the sacred earth-water consecrates the land the kağan governs.
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