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).
Kumaradasa
The Sinhalese translation of his work,"Jānakī-haraṇa", gave credence to the belief that Kumāradāsa was King Kumāradhātusena (513-522 A.D.) of Sri Lanka but scholars do not make any such identification even though the poet at the end of his poem says that his father, Mānita, a commander of the rearguard of the Sinhalese King Kumāramaṇi, died in battle on the day he was born and that his maternal uncles, Megha and Agrabodhi, brought him up. Rajasekhara, who lived around 900 A.D., in his "Kāvyamīmāmsā" refers to the poet as born blind - मेधाविरुद्रकुमारदासादयः जात्यन्धाः. There is also a tradition that this poem was written by Kalidasa. Kumāradāsa came after Kalidasa and lived around 500 A.D., later than Bhāravi but before Māgha. While writing "Jānakī-haraṇa", he certainly had before him "Raghuvaṃśa" of Kalidasa.