The surname An is present in both Korea and China, though unrelated.() literally means "peace" or "tranquility". It also serves as an abbreviation of "Anxi" (安息), meaning "Arsacid" in Chinese and can be romanized as "On". Visitors to China who came from Arsacid-held territories often took the name "An". In 2008, it was the 110th most common surname in the People's Republic of China, shared by over 1.7 million citizens. The surname is most common in Northern China. It is the 79th name on the "Hundred Family Surnames" poem.