What is jang surname?

"Jang" is a surname that originates from Korea. It is the 15th most common surname in South Korea and is the 2nd most common surname in North Korea. The Chinese character for "Jang" (張) is also a common surname in China, but the Korean "Jang" is typically written as "장" in Hangul. Some notable people with the surname "Jang" include South Korean actor Jang Dong-gun and North Korean politician Jang Song-thaek.