Uralic languages impetus from the fact that these languages, unlike most of the other languages spoken in Europe, are not part of what is now known as the Indo-European family. In 1717, Swedish professor Olof Rudbeck proposed about 100 etymologies connecting Finnish and Hungarian, of which about 40 are still considered valid. Several early reports comparing Finnish or Hungarian with Mordvin, Mari or Khanty were additionally collected by Leibniz and edited by his assistant Johann Georg von Eckhart. In 1730, Philip Johan von Strahlenberg published his book ("The North and East Parts of Europe and Asia"), surveying the geography, peoples and languages
Uralic languages evidence of a number of extinct languages of uncertain affiliation: Traces of Finno-Ugric substrata, especially in toponymy, in the northern part of European Russia have been proposed as evidence for even more extinct Uralic languages. All Uralic languages are thought to have descended, through independent processes of language change, from Proto-Uralic. The internal structure of the Uralic family has been debated since the family was first proposed. Doubts about the validity of most of the proposed higher-order branchings (grouping the nine undisputed families) are becoming more common. A traditional classification of the Uralic languages has existed since the late 19th