Saiful Islam or Saif al-Islam (Arabic: سيف الإسلام; "Sword of Islam"), may refer to: People. 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.
https://en.wikipedia.org/wiki/Saiful_Islam