Svetha was king Viraata's son.
However, king Drupada's son too was called Svetha. He was called Shankha too. He was killed in the war by Bheeshma. The references of Svetha and Shankha made in the epic are to be understtod correctly, basing on the context. The trying issue in case of a new reader is the duplication of names in this long story.