ilayam api bharyayam
vayoh putryam maha-balah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The greatly powerful Dhruva Maharaja had another wife, named Ila, who was the daughter of the demigod Vayu. By her he begot a son named Utkala and a very beautiful daughter.