SB 4.10.2

ilāyām api bhāryāyāṁ
 vāyoḥ putryāṁ mahā-balaḥ
putram utkala-nāmānaṁ
 yoṣid-ratnam ajījanat
Word for word: 
ilāyām — unto his wife named Ilā; api — also; bhāryāyām — unto his wife; vāyoḥ — of the demigod Vāyu (controller of air); putryām — unto the daughter; mahā-balaḥ — the greatly powerful Dhruva Mahārāja; putram — son; utkala — Utkala; nāmānam — of the name; yoṣit — female; ratnam — jewel; ajījanat — he begot.
Translation: 
The greatly powerful Dhruva Mahārāja had another wife, named Ilā, who was the daughter of the demigod Vāyu. By her he begot a son named Utkala and a very beautiful daughter.