Sayf al-Din, also Saif al-Din, Sayf/Saif ad-Din, or Sayf/Saif ud-Din etc., may refer to:Sayf al-Din Suri, Ghurid king Saif ad-Din Ghazi I, Zangid emir of Mosul Ghazi II Saif ud-Din, Zangid emir of Mosul al-Malik al-Adil Sayf al-Din Abu-Bakr ibn Ayyub, or just Al-Adil I, also known as "Saphadin", (1145–1218), Ayyubid sultan of Egypt Sayf al-Din al-Amidi, Islamic jurist Saifuddin Aibak, governor of Bengal Saif ad-Dīn al-Malik al-ʿĀdil Abū Bakr b. Nāṣir ad-Dīn Muḥammad, or just Al-Adil II, Ayyubid sultan of Egypt Saif ad-Din Qutuz, Mamluk sultan of Egypt Saif ad-Dīn Qalawun aṣ-Ṣāliḥī, Mamluk sultan of Egypt Saif ad-Din Abu-Bakr, Mamluk sultan of Egypt Al-Malik Az-Zahir Sayf ad-Din Barquq, Burji sultan of Egypt Saifuddin Hamza Shah, fourth Sultan of the first Ilyas dynasty of Bengal Sayf ad-Din Inal 13th Burji Mamluk sultan of Egypt Al-Ashraf Sayf al-Din Qaitbay,, Burji Mamluk Sultan of Egypt Al-Ashraf Sayf-ad-Din Barsbay,, Burji Mamluk Sultan of Egypt Sayf ad-Din Bilbay,, Burji Mamluk Sultan of Egypt Sayf ad-Din Jaqmaq, (1373–1453), Burji Mamluk Sultan of Egypt Sayf ad-Din Khushqadam, (1413–1467), Burji Mamluk Sultan of Egypt Sayf ad-Din Tatar,, Burji Mamluk Sultan of Egypt Sayf al-Din Malik Arslan, Beg of Dulkadir from 1454 to 1465 Sayf ad-Din Tuman bay I, Burji Mamluk Sultan of Egypt Omar Ali Saifuddin I, Sultan of Brunei Omar Ali Saifuddin II, Sultan of Brunei Saifuddin Kitchlew (1888–1963), Muslim Indian lawyer and political activist Taher Saifuddin (1888–1965), leader of the Dawoodi Bohras community Seif el-Din el-Zoubi (1913–1986), Israeli-Arab politician Omar Ali Saifuddien III (1914–1986), Sultan of Brunei Saifuddin Azizi (1915–2003), Uyghur chairman of the people's council of Xinjiang, China Mohammad Saifuddin (1996),Bangladeshi cricketer Saifuddin Ahmed (1927–2010), Bangladeshi film actor Saifuddin Soz, Indian academic and politician Mufaddal Saifuddin Salih Saif Aldin, Iraqi journalist Khamis Abdullah Saifeldin, Qatari runner Saifeddine Nejmaoui, Tunisian boxer Saifuddin Nasution Ismail, Malaysian politician Saifuddin Abdullah, Malaysian politician Saifuddin Choudhury, Indian politician Saifuddin or Saif Ahmad, American poker player The Seif al Din pathogen in Patient Zero: A Joe Ledger Novel