Q: Who was the first Maharajadhiraja?  

Chandragupta I was a king of the Gupta Empire around 320 CE. As the ruler of the Gupta Empire, he is known for forging alliances with many powerful families in the Ganges region.

Chandragupta I was the son of Ghatotkacha and the grandson of Sri Gupta. Unlike his predecessors, who were known as Maharaja (king), he came to be known as Maharajadhiraja (king of kings). He came to power in 320 CE as his father Ghatotkacha died leaving him on the throne. However, it remains unknown how he expanded a "small principality to the status of an important kingdom" by annexing neighbouring kingdoms. He also married a Licchhavi princess, Kumaradevi, indicating that the matrimonial connections between the two led to the "political greatness" of the Gupta dynasty.