Mahavmsa, Ashoka's chief queen was Asandhamitta, not Devi: the text does not talk of any connection between the two women, so it is unlikely that Asandhamitta was another name for Devi. The Sri Lankan tradition uses the word samvasa to describe the relationship between Ashoka and Devi, which modern scholars variously interpret as sexual relations outside marriage, or co-habitation as a married couple. Those who argue that Ashoka did not marry Devi argue that their theory is corroborated by the fact that Devi did not become Ashoka's chief queen in Pataliputra after his ascension. The Dipavamsa refers to two children of Ashoka and Devi – Mahinda and Sanghamitta. Sons Tivara, the son of Ashoka and Karuvaki, is the only of Ashoka's sons to be mentioned by name in the inscriptions. According to North Indian tradition, Ashoka had a son named Kunala. Kunala had a son named Samprati. The Sri Lankan tradition mentions a son called Mahinda, who was sent to Sri Lanka as a Buddhist missionary; this son is not mentioned at all in the North Indian tradition. The Chinese pilgrim Xuanzang states that Mahinda was Ashoka's younger brother (Vitashoka or Vigatashoka) rather than his illgetimate son. The Divyavadana mentions the crown-prince Kunala alias Dharmavivardhana, who was a son of queen Padmavati. According to Faxian, Dharmavivardhana was appointed as the governor of Gandhara. The Rajatarangini mentions Jalauka as a son of Ashoka. Daughters According to Sri Lankan tradition, Ashoka had a daughter named Sanghamitta, who became a Buddhist nun. A section of historians, such as Romila Thapar, doubt the historicity of Sanghamitta, based on the following points: The name "Sanghamitta", which literally means the friend of the Buddhist Order (sangha), is unusual, and the story of her going to Ceylon so that the Ceylonese queen could be ordained appears to be an exaggeration. The Mahavamsa states that she married Ashoka's nephew Agnibrahma, and the couple had a son named Sumana. The contemporary laws regarding exogamy would have forbidden such a marriage between first cousins. According to the Mahavamsa, she was 18 years old when she was ordained as a nun. The narrative suggests that she was married two years earlier, and that her husband as well as her child were ordained. It is unlikely that she would have been allowed to become a nun with such a young child. Another source mentions that Ashoka had a daughter named Charumati, who