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).
Sunan Kalijaga
Sunan Kalijaga (1460-1513), born as Raden Mas Said son of a Duke of Tuban in East Java, Indonesia, was one of the "nine saints" of Javanese Islam (Wali Sanga). the "Kalijaga" title was derived from an orchard known as "Kalijaga" in Cirebon. Other accounts suggest the name derives from his hobby of submerging himself in "Kali" ("river" in Javanese). Others note that the name Kalijaga derived its nature from the Arabic notion of "qadli dzaqa" which means "holy leader" in the sultanate.