Former Bihar minister Rajiv Ranjan Singh, alias Lalan Singh, was on Tuesday named as the JD(U)'s leader in the Lok Sabha.
The party has also appointed its MPs Vaidyanath Mahto and Dileshwar Kamait as the deputy leader and the chief whip respectively in the Lok Sabha, a communication received here from the office of Chief Minister Nitish Kumar - the JD(U)'s national president - said.
While Singh, a close aide of the chief minister, represents Munger, Mahto and Kamait are MPs from Valmiki Nagar and Supaul constituencies respectively.
An alliance partner of the NDA in the state, the JD(U), which has chosen to stay out of Narendra Modi's council of ministers, has 16 members in the Lower House of Parliament.