Descent from Genghis Khan ( Altan urag, meaning "Golden lineage"; Kazakh : Töre), generally called Genghisids, is traceable primarily in Central Asia; Mongolia, Inner Mongolia in China, Siberia and Koreas. His four sons and other immediate descendants are famous by names and by deeds. Later Asian potentates attempted to claim descent from the House of Borjigin even on flimsy grounds, such as was considered Mongol matrilineal descent. In the 14th century, valid sources (heavily dependent on Rashid al-Din and other Muslim historians) all but dried up. With the recent popularity of genealogical DNA testing, a wider circle of people started to claim descent from Genghis Khan.