Cognomen 迪拉克 (Dirac 
, 迪拉克 
) , around the globe, is a very rare surname. The surname 迪拉克 is habitual in Switzerland, where it is a rare surname, Denmark, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in the United States, Switzerland, and the United Kingdom. More prevalently, 迪拉克 is the forename as well as the last name.