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Tengri (Heaven)
“The Mongol word Tengri (= Heaven) appears also in Hiung-nu times; in fact, the word shen yü is stated to have been used by the Hiung-nu alternatively with Tengri kudu (Son of Heaven).” (E. H. Parker, Asiatic Quart. Rev., Jan., 1904, p. 141.)
LIV., p. 263 n.