Khalid ibn al-Walid, general and companion to the Islamic prophet Muhammad
Tughtakin ibn Ayyub, second Ayyubid emir of Yemen and Arabia between 1182 and 1197
Saiful Islam Khan (1942–2019), Bangladeshi poet and literary critic
Ahmed Seif El-Islam (1951–2014), Egyptian politician
Abuhena Saifulislam (born 1963), imam chaplain in the US armed forces
Saiful Islam (chemist) (born 1963), British chemist
Saiful Islam (cricketer, born 1969) (born 1969), Bangladeshi cricketer
Mohammad Saiful Islam (born 1970), Bangladeshi politician
Saif al-Islam Gaddafi (born 1972), son of former Libyan leader Muammar Gaddafi
Saiful Islam Mannu (born 1972), Bangladeshi film director
Saiful Islam Al-Payage (born 1979), Indonesian preacher
Shaiful Islam (born 1983), Bangladeshi cricketer
Saiful Islam Hiru, Bangladeshi politician
Saiful Islam (film editor), Bangladeshi film editor
Saiful Islam Badal, Bangladeshi cinematographer
Saiful Islam Joarder, Bangladeshi army fugitive
Saiful Islam Duke, Bangladesh Navy lieutenant commander
Saiful Islam (Natore politician), Bangladeshi advocate and politician
Saiful Islam (electrical engineer), former vice-chancellor of Bangladesh University of Engineering and Technology
Saif al-Islam al-Masri, Egyptian member of al-Qaeda

People

Other