Family name 格廷 (Guertin 
, 格廷 
, Girtin 
) , all over the world, is quite a common surname. The cognomen 格廷 is characteristic of Canada, where it is quite a rare surname, New Zealand, and the United States, where it is a rare surname. Not in comparison with a country's population, the name is most common in the United States, Canada, and France. Very seldom, 格廷 is the forename as well as the last name.