İsmail Hakkı Bey (1883-1923), officer of the Ottoman Army and the Turkish Army
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İsmail Hakkı Duru (born 1946), Turkish theoretical physicist and professor of Mathematics
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Bursalı İsmail Hakkı or İsmail Hakkı Bursevî (1653-1725), Ottoman lyricist, sheikh of the Celvedi Tekke in Bursa.
Dera Ismail Khan | Usmar Ismail | Qadry Ismail | Ismail Khan | Ismail Kadare | Ismail Haniyeh | Taufiq Ismail | Ismail Merchant | Wan Azizah Wan Ismail | SS Khedive Ismail | Saida Haji Bashir Ismail | Mourad Ismail | İsmail Hakkı Duru | İsmail Hakkı Bey | Hazem Salah Abu Ismail | Chihara–Ismail polynomials | Sultan Ismail Power Station | Sultan Ismail Petra Airport | Sultan Ismail | SS ''Khedive Ismail'' | Rodziah Ismail | Raghib Ismail | Mustafa Osman Ismail | Mehmet Hakkı Suçin | Mamdouh Ismail | Junaid Ismail Dockrat | İsmail Türüt | Ismail Qemali's government | Ismail Khilath Rasheed | Ismail Ibn Sharif |