King of the Gandharvas, who fought for three years near the Hiranyavati river against his namesake, king Chitrangada, and killed him.
The reason for the fight was, that the Gandharva thought that there could only be one king Chitrangada.
For the story visit
http://hindumythologyforgennext.blogspot.com/2012/08/bhishma-and-sons-of-satyavati.html