Cognomen Saifeddin (Saifeddin 
) , across the world, is a very rare family name. The family name Saifeddin is characteristic of Tunisia, where it is a rare surname, Venezuela, where it is an extremely rare surname, and Canada. More frequently, Saifeddin is the forename as well as the last name.
Moh, Mustafa, Altayeh, Ab-Baker, Chaouch, Bouserg, Tantash, Nakkachi, Elboulmani, Mansour, Essaied, Bouhoula, Khaddour, Romdhani, Gouasmia, Esmeiran, Alshalabi, Alsalameh, Hassan-Beck, Alkhatib, Hassan, Laimon, Ghribi, Saif, Asab, Saleh, Sahli, Ayesh, Ahmad, Ahmed, Kayed, Kraim, Rabhi, Nijim, Hamed, Yasin, Matoui, Mallik, Kalifa, Khaled, Daghrour, Ghaith, Al-Khawaldeh, and Abdalrahman