Mirza Tahir Ahmad was the Grandson of Mirza Ghulam Ahmad who claimed to be the Promised Messiah and Mahdi and the son of Mirza Basheer-ud-Din Mahmood Ahmad, the second Caliph of the Ahmadiyya Muslim Community, from his wife Syeda Maryam Begum. His mother Syeda Maryam Begum was daughter of Syed Abdul Sattar Shah, a companion of Mirza Ghulam Ahmad.
Mirza Tahir Ahmad married Asifa Begum in 1957. Asifa Begum died from cancer of the pancreas [15] on April 3, 1992. His marriage bestowed him 5 daughters, one of whom died in infancy. His daughters are Shaukat Jehan, Faiza, Yasmin Rehman Mona, Atiatul Mujib Tooba and one daughter who died in infancy. He had no sons but later he took the upbringing and educational training of a boy, Bashir.