What is "pururavas"

Pururavas ( Sanskrit:पुरूरवस्) was the first king of the Aila dynasty or the Somavamsha. According to the Vedas, he is a mythological entity associated with Surya (the sun) and Usha (the dawn), and is believed to resided in the middle region of the cosmos. The Rig Veda (X.95.18) states that he was a son of Ila and was a pious king. However, the Mahabharata states that Ila was both his mother and his father. According to the Vishnu Purana, his father was Budha, and he was ancestor of the tribe of Pururavas, from whom descended the Kauravas and Pandavas.