Comments:Poppe 13, 69, АПиПЯЯ 289, KW 378, VEWT 460. A rather complicated case. Both Turkic and Mongolian forms are attested late, and can be borrowed from each other. If Mong. < Turk., then one could perhaps consider instead a possibility of comparing PT *T(i)āna with Mong. *taŋlaji 'palate' (whence again Chag. taŋlaj etc., see KW 379, VEWT 461-462, and Evk. taŋilai, see Doerfer MT 128). However, Mong. *taŋlaji may be alternatively compared with Turk. *damgak 'palate' (ЭСТЯ 3, 142; thus in Владимирцов 285, Лексика 230) - if one supposes a secondary assimilative change *t- > *d- in Turkic. PT *damgak 'palate; gills' may be, in its turn, alternatively compared with Evk. ǯalgama 'a piece of skin from deer's chin'. This knot of etymological problems is yet to be untangled.