In an old book on The Harivamsa Purana, I had read that Shvetaketu and Uddhava fought against each other for Shaibya. Both wanted to marry her, who then married Lord Krishna. They were Brahamana-Khsatriya friends of Lord Krishna. Shaibya was the niece of Paundraka Vaasudeva.
Can one elaborate this story with some textual proof.