Worldwide, סר (Sir 
, סר) is a rare largely boy's, but infrequently female first name. The first name סר is habitual in Armenia, where it is a rare girly name, United Arab Emirates, where it is a rare male name, and Kenya. Measured by absolute frequency, it is the most numerous in Kenya, China, and Myanmar. More prevalently, סר is the last name as well as the forename.
סר is also a prevalent name for the fictitious and mythical characters: Sir Ector , the fictional character from Disney's "The Sword in the Stone"; Sir Kay , the fictional character from Disney's The Sword in the Stone; Sir Hiss , the character from Disney's Robin Hood; Sir John Falstaff , the operatic character in the opera Falstaff by Giuseppe Verdi; a fat knight and Sir Handel , character in The Railway Series, and in many other works.