Surname เจริญชัย (เจริญชัย 
, Charoenchai 
, Jaroenchai 
, along with others...) , all around the world, is quite a common cognomen. The family name เจริญชัย is habitual in Thailand, where it is quite a rare surname, the United States, where it is an extremely rare surname, and China. Also, เจริญชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Charernchai, Jarernchai, Chareanchai, เจริญชัย, Jareonchai | Thailand |
| Charoenchai | Thailand, Malaysia, Vietnam, United States, Norway |
| Jaroenchai | Philippines, China, Thailand, United States |
| Chareonchai | New Zealand, Thailand |
Chaaroenchai, Charaenchai, Chareaochai, Charearnchai, Charenchai, Charermchai, Charienchai, Charoanchai, Charoebchai, Charoechai, Charoemchai, Charoenchaip, Charoenchais, Charoenchane, Charoendachai, Charoenj, Charoenkhai, Charoensingchai, Charoinchai, Charonchai, Charonechai, Charonenchai, Charroenchai, Charuenchai, Chasreechai, Chaurchai, Chroeychai, Ckaroenchai, Jalearnchai, Jalernchai, Jaloenchai, Jaraenchai, Jararnchai, Jareadchai, Jareanchai, Jareenchai, Jaroanchai, Jaroenchail, Jaroenchais, Jaroenchay, Jaronechai, Jaruenchai, and Jraonchai