Their ancestor Fatehdad Khan Ghaznavi Lohani had arrived to Bengal from Ghazni in Afghanistan and was from the Lohani tribe of the Pashtun people, this ancestor had established a Zamindari, Abdul Hakim Ghaznavi had inherited factions of this zamindari in Delduar.
[1] Abdul Karim Ghaznavi studied in St. Peter's School of Devonshire in England, Wren and Gurney's Institution and London University.
On the other hand, governor of newly established province Sir Joseph Bampfylde Fuller named him "right Ghaznavi".
[1] From 1913 to 1916 he was a government nominated member of Viceroy's council from Muslim constituency of Bengal Presidency.
In his tenure he was appointed to handle Hajj managementą„¤ To discuss on travel of pilgrims British Indian government sent him to the then ruler of Mecca Hussein bin Ali.
[1] In 1924 he commented before Administration reform inquiry committee that European style democracy would be harmful for Indian Muslims.
Under his leadership a group of 15 Muslim leaders gave joint statement in newspaper to support Simon commission.