Some time about 1790 a Zamindari was created in Korea by the name of Changbhakar. It continued to be a Zamindari under Korea State till 1818. In the Kabuliat of 1819, the East India Company separated it from Korea State and declared it a feudal dependency of Korea State. The Tribute was fixed at 376Rs which was to be paid through Korea State. In the Sanad of 1848, the tribute was to be paid direct to the East India Company. The title of Bhaiya was conferred on the family by Maharaja Amar Singh.
- Raja SAWAL SAHI DEO, Raja of Korea, married and had issue.
- Raja Gajraj Singh Deo (qv)
- Lal Dilip Singh Deo, married and had issue.
- Raja Garib Singh Deo, Raja of Korea.
- Lal Man Singh Deo (qv)
- Raja GAJRAJ SINGH DEO, Raja of Korea and 1st Zamindar of Changbhakar fl. ca1790, he died sp.
- Lal MAN SINGH Deo, 2nd Zamindar of Changbhakar 1819/-, he made Bharatpur his capital.
- Lal JANJIT SINGH Deo, 3rd Zamindar of Changbhakar 1848/1865
- Bhaiya BALBHADRA SINGH Deo, 4th Zamindar of Changbhakar 1865/1897, born about 1825, succeeded 1st December 1865, brother of Lal Ran Bahadur Singh.
- Bhaiya MAHABIR SINGH Deo, 5th Zamindar of Changbhakar 1897/1930, born , succeeded 30th September 1896; died 1930 (1932?).
- Bhaiya KRISHNA PRATAP SINGH Deo, 6th Zamindar of Changbhakar 1930/- , he was adopted from Bhaiyathan, being a minor he was only granted ruling powers in 1946. He shifted his capital from Bharatpur to Janakpur.