Last name 伊伦 (Yilun 
, 伊伦 , Ihlen 
) , worldwide, is a rare surname. The family name 伊伦 is habitual in Norway, where it is quite a rare surname, Latvia, where it is a rare surname, and Singapore, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Norway, China, and the United States. More prevalently, 伊伦 is the forename as well as the last name.