Suniti

King Uttanapada had two wives, Suniti and Surichi. He loved Surichi and her son Uttama more. Suniti and her son Dhruva suffered.

Dhruva prayed to Vishnu to reach a place where nobody had been yet. Vishnu made him the pole star.

To read about Dhruva visit
http://hindumythologyforgennext.blogspot.com/2012/03/dhruva-pole-star.html