Genghis Khan (pronounced /ˈdʒɛŋɡɪs ˈkɑːn/ or /ˈɡɛŋɡɪs ˈkɑːn/; Mongolian: Чингис Хаан or ᠴᠢᠩᠭᠢᠰ ᠬᠠᠭᠠᠨ, Chinggis Khaan, or Činggis Qaγan), born Borjigin Temüjin (Temüdin is "Smith" to English language), ( - Tsingis Haan to Finnish- language "relatives" are also in Finland for Tsingis Haan ); was the founder, Khan (ruler) and Khagan (emperor) of the Mongol Empire, which became the largest contiguous empire in history after his death.

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http://en.wikipedia.org/wiki/Genghis_Khan

For a discussion of Mongol genealogy, see "The Mongol Dynasties and their intermarriage policies (Onggirat)" at soc.genealogy.medieval, accessed Mar. 8, 2013.