In addition to Genghis Khan and his male descendants, researchers have previously identified the founders of two other highly successful Y-chromosome lineages: one that began in China with Giocangga, a Qinq Dynasty ruler who died in 15823, and another belonging to the medieval Uí Néill dynasty in Ireland. Jobling's team made a systematic search for genetic founders by analysing the Y chromosomes of more than 5,000 men from 127 populations spanning Asia... because lots of data were available and there was already evidence of such lineages. The team identified 11 Y-chromosome sequences that were each shared by more than 20...