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 grammatical and phonological features, in particular the similarities in the Uralic and Altaic pronouns and the presence of agglutination in both sets of languages, as well as vowel harmony in some. For example, the word for "language" is similar in Estonian ("keel") and Mongolian ("хэл" ("hel")). These theories are now generally rejected and most such similarities are attributed to language contact or coincidence. Nostratic associates Uralic, Indo-European, Altaic, Dravidian, and various other language families of Asia. The Nostratic hypothesis was first propounded by Holger Pedersen in 1903 and subsequently revived by Vladislav Illich-Svitych and Aharon Dolgopolsky in the 1960s. Eurasiatic