The sources for Rashtrakuta history include medieval inscriptions, ancient literature in the Pali language, contemporaneous literature in Sanskrit and Kannada and the notes of the Arab travellers. Theories about the dynastic lineage ("Surya Vamsa"—Solar line and "Chandra Vamsa"—Lunar line), the native region and the ancestral home have been proposed, based on information gleaned from inscriptions, royal emblems, the ancient clan names such as "Rashtrika", epithets ("Ratta", "Rashtrakuta", "Lattalura Puravaradhiswara"), the names of princes and princesses of the dynasty, and clues from relics such as coins. Scholars debate over which ethnic/linguistic groups can claim the early Rashtrakutas. Possibilities include the north western ethnic groups of India, the Kannadiga, Vokkaliga,Reddi, the Maratha, or the tribes from the Punjab region.