Y chromosomes reveal founding father

About 1.5 million men in northern China and Mongolia may be descended from a single man, according to a study based on Y chromosome genetics1. Historical records suggest that this man may be Giocangga, who lived in the mid-1500s and whose grandson founded the Qing dynasty, which ruled China from 1644 to 1912. The analysis is similar to a controversial study in 2003, which suggested that approximately 16 million men alive today are descended from the Mongolian conqueror Genghis Khan2.

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http://www.nature.com/news/2005/051024/full/051024-1.html