Yup Saqib is his only son.
I also read somewhere that when people use to call him at office, because of his long name he use to reply like, "hello allah speaking" :)
INDEED........and I am privileged to inform here that currently..it's only my dad (Jamiluddin Aali) who is the most cogent source--on such infos., on greats like Q.U.Shahab, mumtaz Mufti, Ahmed nadim Qasmi, Noon Meem Rashid ( though I also know his grand-daughter Fariha Rashed of "INK" Lahore well through my facebook ) Ibne insha, saleem Ahmed, Qurrat Ul Ain Haider, Faiz and the list goes on.
YES...Shahab Chacha had this tendency to say such interesting anecdotes spontaneously:)....
My father say's that once ( when they both were working at the President's House...which is now Governor's House at karachi before the Capital was shifted to Rawalpindi )...my father lost some file..and at one point Field Marshall Ayub Khan asked "Jamil, woh Queen Elizabeth ki Pakistan visit ki details kahan hein" to which my dad said "Sir...dhoondh raha hoon...kahin koh gayee hein"...Ayub said "Whatt?" tow hich Shahab Chacha said " Sir, he is close to Duke of Edinburgh..he will manage everything!" and ayub gave a laughter...( though the file was found at Ayub's desk's drawer:) )
Shahab Chacha was Principle Secretary to Ayub...my Dad was Personal Staff Officer to Ayub on depuatation from Pakistan taxation service.
I was regularly in touch with Shahab Chacha till his Secretary education days. He then went to THE HAGUE as Pakistan's Ambassador.
Finally he got settled in UK at GILMORE..where my parents spent six weeks with him and Iffat Aunty. I have some pics of GILMORE I am trying to trace..anad would scan and post soon....
Best,
Raju