Cognomen サイフ (Saif 
, サイフ 
) , globally, is a widespread surname. The surname サイフ is characteristic of Oman, where it is a common surname, Dominica, and Bahrain (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Egypt, Bangladesh, and Saudi Arabia. More frequently, サイフ is the forename as well as the last name.