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–Yukaghir languages the subgrouping of the language family that must have existed if Uralic, Yukaghir, and Indo-European are all related. While the similarities he attributes to Uralic and Yukaghir, but not to Indo-European, such as the imperative endings, show closer kinship of Uralic and Yukaghir than of Uralic and Indo-European, the similarities he attributes to Uralic and Indo-European, but not to Uralic and Yukaghir, could also be placed in the balance, for example a plural in "*-i". Collinder appears to enumerate approximately as many morphological similarities between Uralic and Indo-European as between Uralic and Yukaghir and at least as many similarities in