Surname 席德 (Sid 
, Syd , 席德 
) , throughout the world, is a common family name. The cognomen 席德 is habitual in Algeria, where it is quite a common surname, United Arab Emirates, where it is quite a rare surname, and Mauritius. In absolute terms, this name is the most popular in Algeria, India, and Pakistan. Likewise, 席德 is the forename as well as the last name.