Syed Qamarul Ahsan was born into a
Bengali Muslim zamindar family known as the
Syeds of Bamna based in
Barguna, then located under the
Backergunge District of the
Bengal Presidency. His great grandfather, Syed Mir Qadir Bakhsh, belonged to the
Syed family of
Malidia in
Faridpur but Bakhsh's son, Syed Mir Sarwar Jan (d. 1914), migrated to Bamna in
greater Barisal after marrying Azizunnesa, the daughter of Taluqdar Husayn ad-Din Chowdhury, and eventually inheriting the
taluqdari of Ramna-Bamna. Qamarul Ahsan was the fourth son among the four sons and one daughter of Syed Abi Muhammad (d. 1951). His eldest brother, Syed Najmul Ahsan, was the father of Bangladeshi parliamentarian
Syed Rahmatur Rob Irtiza Ahsan. The second brother, Syed Ziaul Ahsan, was a speaker for the
East Bengal Legislative Assembly during the
United Front regime and married to Syeda Shaukat Ara Begum, the daughter of Syed Abdul Jabbar, a
zamindar of
Comilla. His third brother, Syed Moinul Ahsan, was the vice-principal of
Dhaka College and the father of former secretariat Shamim Ahsan.
Syeda Sajeda Chowdhury, the incumbent deputy leader of the
Jatiya Sangsad, is the daughter of Qamarul Ahsan's cousin Syed Shah Hamidullah. ==Career==