[1] The Khandakars of Murshidabad had claimed descent from the first Muslim Caliph, Abu Bakr; they claim that one of Abu Bakr's eighth generation descendants had migrated from Arabia to Iran.
[2][3] Khawaja Rustam, a descendant of this migrant from Arabia to Iran, had migrated from Khorasan, Iran to the Indian Subcontinent, his son Khawaja Ziauddin Zahid settling in Allahabad.
[3][1] They had later moved to Bengal, where Sheikh Sirajuddin, son of Khawaja Ziauddin Zahid was appointed as Qazi-ul-Quzzat by Sultan Ghiyasuddin.
[3] In 1869, Khandakar Fazle Rabbi, aged 21 travelled to England to manage the affairs of the last Nawab Nazim of Murshidabad.
[1] Khandakar Fazle Rabbi had written three books ‘Kitab e Tasdikun Lehad’, ‘Hakikate Musalman e Bangalah’ and ‘Tareekh e Hindustan.