"The Scandinavian and Teutonic Wodin is almost certainly of Tartar origin. I offer a proof of this here. The Latin ira, the German wuth, the Celtic Gwydion, the god Wodin of the Sagas, appear to be words derived from a mother word in the Mongol tongue. There we find ada, an evil being, a fury. Ada ujihu is in Mongol to look on as bad. Agoril is anger, and agorlaho is to be angry. The Tartars very anciently dropped ag, to form ada. In this state it passed into Indo-European.
Ira in Latin has lost initial g, as the Mongols have. This account of the word Odin may be supported by adducing other words. It is a fact that the word elf, "fairy", is albin in Mongol, and lip in Chinese. Also the Erlking of Goethe is erlig han in Mongol, where erl is erlig and king is han. These three examples support each other, and suggest that Tartar mythology is Teutonic mythology in an early stage. The angry appearance of sky and air in a thunderstorm is the source from which this mythology grew up in Tartary and was conveyed thence to the western homes of the Teutons."
This text is from Joseph Edkins (1893): "The early spread of religious ideas: Especially in the far east"
Holmboe: "Odin's-Dag , jour d'Odin" is the same as "sanscrit : budhavâra, le tour de Buddha, et en hindoustani, budh-bâr," but I think the Sanskrit Budhvara or Budha's day refers to the primodal Budha not the historical Buddha, though both are from the same root "bodj." The Odinsdag/Budhawar connection may be older than the Buddha.(Quote from Parasar and Traces de buddhisme en Norvége avant l'introduction du christianisme by Christopher Andreas Holmboe, 1857).
An interesting fact is that the Sami people that is considered the first people in the Nordic areas did not worship Odin, however they worshiped Thor (Tiermes).