Kālidāsa
The most popular theory is that Kalidasa flourished during the reign of Chandragupta II, and therefore lived around 4th-5th century CE. Several Western scholars have supported this theory, since the days of William Jones and A. B. Keith. Many Indian scholars, such as Vasudev Vishnu Mirashi and Ram Gupta, also place Kalidasa in this period. According to this theory, his career might have extended to the reign of Kumaragupta I (r. 414 – 455 CE), and possibly, to that of Skandagupta (r. 455 – 467 CE).
Jānāśrayī Chandoviciti
Scholar C. R. Swaminathan, who dated the Polamuru inscription to 593 and ascribed it to the Vishnukundina king Madhava-varman I, suggested that this king may be identified as Janāśraya. "Jānāśrayī Chandoviciti" includes quotations from the Sanskrit poet Kumaradasa, and Swaminathan's interest in dating Janāśraya was to determine Kumaradasa's date. Swaminathan identified Kumaradasa as the 6th century Simhala king Kumara-Dhatusena, and noted that it is unlikely that the writings of a Simhala king became popular in the Vishnukundina-ruled Andhra region in such a short time (by the reign of Mahdava-varman I). Therefore, he alternatively suggested that Janāśraya may have been the later Vishnukundina king Madhava-varman II, the end of whose reign he assigns to c. 620. However, there is no evidence that Madhava-varman II bore the title "Janāśraya".