Pan is a Chinese family name.
A Chinese surname that is often romanized as Poon, Pun, or Pon. The surname also sees use in Korea and Vietnam , though the origins within those countries may not be the same as the Chinese one.
One source lists Ji Sun, a descendant of Zhou Wen Wang as to being the origin of this surname. With his descendants having taken up the name of the area he governed, situated north of Shaanxi.