Why Arjuna in the Mahabharata is also known as Phalguna?

Phalguna, or Phalgunan, is one of the 10 important names of Arjuna in the Mahabharata. Arjuna is known as Phalguna because he was born on the Uttaraphalguni Nakshatra – one of the 27 birth star. Uthara Phalguni Nakshatra is the 12th birth star among 27 Nakshatras in Hindu Jyothisha or astrology.

Kunti gave birth to Arjuna on mount on the Himalayas. Details regarding the names of Arjuna are found in the Virata Parva of the Mahabharat. He narrates them to Uttara Kumara. Arjuna was then living in the court of King Virat as Brihannala – the eunuch.

Uttara Kumara was given the duty of stopping an advancing Kaurava Army towards his kingdom. But the prince had not will power and strength to fight the might Kauravas. Brihannala took duty of the charioteer of Uttara Kumara and fought against the Kauravas. Before letting Brihannala fight against Kauravas, Uttara Kumara wanted to make sure that Brihannala was Arjuna. So he asks about the ten important names of Arjuna.

The ten important names of Arjuna include Partha, Kiriti, Svetavahana, Jishnu, Bhibatsu, Vijaya, Savyasachi and Dhananjaya.