Raja Pratap Bahadur Singh (1889âÂÂ1921) was taluqdar of Pratapgarh Estate of Oudh, British India. He came from a Somvanshi Rajput family. He was Vice President of British Indian Association from 1911 to till 1918. Singh also represented as President of Akhil Bharatiya Kshatriya Mahasabha in 1907.