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).
Anekantavada
The Digambara scholar Kundakunda, in his mystical Jain texts, expounded on the doctrine of "syādvāda" and "saptibhaṅgī" in "Pravacanasāra" and "Pancastikayasāra". Kundakunda also used "nayas" to discuss the essence of the self in "Samayasāra". Kundakunda is believed in the Digambara tradition to have lived about the 1st-century CE, but has been placed by early modern era scholars to 2nd or 3rd century CE. In contrast, the earliest available secondary literature on Kundakunda appears in about the 10th century, which has led recent scholarship to suggest that he may have lived in or after 8th-century. This radical reassessment in Kundakunda chronology, if accurate, would place his comprehensive theories on "anekantavada" to the late 1st millennium CE.