Throughout the world, เจ็ง (Cheng 
, Gen 
, Jeng ) is a common epicene given name. The first name เจ็ง is habitual in Macao, where it is a common epicene name, Hong Kong, and Singapore, where it is quite a common unisex name (explore the name in all countries). In absolute terms, it most frequently occurs in China, Hong Kong, and Italy. More prevalently, เจ็ง is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Cheng, Jeng | China, Malaysia, Hong Kong, Taiwan, United States |
| Gen | China, Malaysia, Hong Kong, Singapore, United States |
| เจ็ง | Thailand |
เจ็ง is also a popular name for the fictitious and mythical characters: Cao Zheng , the Water Margin character; Wang Zheng , the Water Margin character; Li Cheng , the fictional character in Water Margin; Gen Fu , the fictional character from Dead or Alive, Dead or Alive 5 Last Round and Cheng Sinzan , the fictional character from Fatal Fury, Fatal Fury 2, and in many other works.
แซลี, แซตัน, อุนาตุโล, อรัญชราธร, ปิยัสสพันธุ์, จิรชวาลา, จงสวัสดิ์, หงส์มังกร, อินทโสภา, เปรมชาวนา, อรรถาวี, เตชะสัมพันธ์, เรืองขจร, บุญเลิศรัตน์, เพ็ชรรัตน์, and พิสุทธิ์ธนะไพโรจน์