प्रति कल्हण, आनंगालेखाया बिखौ गावनि दौहित्र फोसावदोंमोन, आरो दुर्लभाकाया गावनि बिबौनि बिमुंखौ बोज'बनानै प्रतापादित्य मुङै मिथिजानो हमो ।
Per Kalhana, Anangalekhaa had him declared as her dauhitra, and Durlabhaka became known as Pratapaditya, adopting the surname of his maternal grandfather.