Banaili
Banaili Raj also known as Garhbanaili Raj was a zamindari estate based in the Indian state of Bihar. They were considered one of the ruling dynasties of the Mithila region. The name of the estate derives from a village Banaili in the then Purnia district of Bihar. One of the centres of Banaili Raj located in Sultanganj is believed to have ancient historical or mythical association. The Krishnagarh Palace built by Kumar Krishnanand Singh on Sultanganj is in the Karnagarh area, which is believed to be place where the castle of King Karna, who features in the  Mahabharata, was located. See also
Raja Bahadur Kirtyanand Sinha
Zamindars of Bihar

References

Culture of Mithila
Palaces in Bihar
Purnia district
Zamindari estates