Surname 赛迪 (Sidey 
, 赛迪 
, Sydie 
) , in the world, is a rare family name. The surname 赛迪 is characteristic of New Zealand, where it is a rare surname, Senegal, and the United Kingdom. In absolute terms, it is the most numerous in the United Kingdom, the United States, and Canada. Likewise, 赛迪 is the forename as well as the last name.