 Though the roots of the family can be traced to 11th-12th centuries as done ably by Girijanand Sinha in his book, "Banaili - Roots to Raj", the family achieved its famed eminence only in the 19th century during the reign of Raja Bahadur Dular Singh Chowdhry.It was Raja Dular Singh who fixed the family residence at Banaili and gave the family its current name.He was an enterprising Raja and added to the family's wealth using the opportunities afforded by the Permanent Settlement implemented by Lord Charles Cornwallis, 1st Marquess Cornwallis in the then state of Bengal.