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).
Vararuchi
Vararuci's name appears in a Sanskrit verse specifying the names of the 'nine gems' (navaratnas) in the court of the legendary King Vikramaditya who is said to have founded the Vikrama era in 57 BCE. This verse appears in "Jyotirvidabharana", which is supposed to be a work of the great Kalidasa but is in fact a late forgery.