Shurasena or Shursen/Shursaini (Sanskrit: शूरसेन, IAST: Śūrasena) was a ruler of Mathura or Sursena Mahajanpada. He was married to a nāga community woman named Marisha. She bore all of his children and was the cause for Vasuki's boon to Bhima.[2] He is stated to be the king after whom the Surasena Kingdom was named and founded.