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).
Vikramaditya
Although some authors believe that Vikramaditya was a mythical character, others hypothesize that he was a historical Malava king from around the first century BCE. Still others believe that he was a legendary character based on an historical king, identified as Chandragupta II, Gautamiputra Satakarni or Yashodharman. Vikramaditya may also be based on several kings, legends about whom gradually coalesced into a tradition surrounding him. According to K. Krishnamoorthy, "Vikramaditya" and "Kalidasa" were used as common nouns to identify a patron king and court poet.