Cognomen ซีฟ (Sip 
, ซีฟ) , worldwide, is quite a common family name. The surname ซีฟ is characteristic of Israel, where it is quite a common surname, Czechia, where it is quite a rare surname, and Slovakia. Measured by absolute frequency, it is the most numerous in Indonesia, Israel, and Czechia. Likewise, ซีฟ is the forename as well as the last name.