The Duke of Fan refers to the titular heads of two different dukedoms in historical China, both romanized in the same way in Hanyu Pinyin.
Zhong Shanpu was a judge in the reign of King Xuan of Zhou (r. 827–782 BCE).
Zhong was instrumental in the northern expansion of the Zhou dynasty, and was awarded with the title Duke of Fán (South west of Ji Yuan in Henan Province).
Shi Hui (士会), great grandson of Du Bo, was an army general, and became the Commander in Chief of the Jin kingdom (632–403 BCE).
In reference to his title as Duke he is also known as Sui Hui (随会), or Fan Hui (范会), and his descendants assumed one of the following last names, Fan (范), Sui (随), or Shi (士).