Ashoka's own inscriptions are fairly detailed, but make no mention of his ancestors. Other sources, such as the Puranas and the "Mahavamsa" state that his father was the Mauryan emperor Bindusara, and his grandfather was Chandragupta – the founder of the Empire. The "Ashokavadana" also names his father as Bindusara, but traces his ancestry to Buddha's contemporary king Bimbisara, through Ajatashatru, Udayin, Munda, Kakavarnin, Sahalin, Tulakuchi, Mahamandala, Prasenajit, and Nanda. The 16th century Tibetan monk Taranatha, whose account is a distorted version of the earlier traditions, describes Ashoka as the illegitimate son of king Nemita of Champarana from the daughter of a merchant.