Dear brother Mobasher,
The title of Allama, like many other titles, begins with one man, and sooner or later may become popular. Remember that many titles are well-deserved while others are not.
Khwaja Hasan Nizami called Sir Muhammad Iqbal "Allama" in 1921 and wrote that in a few newspapers. The well-deserved title gained instant popularity.
Sardar Abdur Rabb Nishtar called Muhammad Ali Jinnah as "Quaid-e-Azam" in 1939, once again a well-deserved title and it was echoing throughout India within one week.
Rabindranath Tagore conferred "Mahatma" on Mohan Das Karamchand Gandhi and it became instantly popular.
Well-deserved titles are a matter of great honor, hence the knighthood by the British monarchy, HJ, SJ, NH, HI, SI etc in Pakistan and various titles in almost all countries.