Surname Chenchen (Chenchen 
, 忱忱 , 沉沉 ) , across the world, is quite a rare cognomen. The surname Chenchen is habitual in Tunisia, where it is a rare surname, Malaysia, and Singapore. Not in comparison with a country's population, it is the most numerous in China, Indonesia, and Malaysia. More prevalently, Chenchen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chenchen | Indonesia, United States, Taiwan, Philippines, China |
| 忱忱, 陈琛, 沉沉 | China |
Chenchén, Хенчен, Ченчен, Чэнчэн, Чэньчэнь, Шеншен, チェンチェン, 儭儭, 儭橙, 嗔嗔, 塵沉, 宸宸, 宸尘, 宸晨, 宸琛, 宸臣, 宸辰, 尘尘, 尘晨, 尘沉, 尘琛, 尘辰, 忱宸, 忱晨, 忱琛, 忱臣, 忱辰, 忱陈, 晨宸, 晨尘, 晨忱, 晨晨, 晨橙, 晨沉, 晨琛, 晨臣, 晨趁, 晨辰, 晨郴, 晨陈, 曟曟, 榇儭, 橙晨, 橙橙, 橙琛, 橙臣, 橙辰, 沈宸, 沈忱, 沈晨, 沈沈, 沈沉, 沈琛, 沈臣, 沈陈, 沉塵, 沉尘, 沉晨, 沉臣, 沉辰, 沉陈, 琛宸, 琛尘, 琛晨, 琛琛, 琛臣, 琛辰, 琛郴, 琛陈, 臣宸, 臣晨, 臣沈, 臣琛, 臣臣, 臣谌, 臣辰, 莀莀, 衬衬, 諃諃, 谌宸, 谌忱, 谌晨, 谌琛, 谌谌, 谌陈, 趁趁, 辰宸, 辰尘, 辰忱, 辰晨, 辰橙, 辰琛, 辰臣, 辰辰, 辰陈, 郴琛, 郴辰, 郴郴, 陈宸, 陈尘, 陈忱, 陈晨, 陈橙, 陈沈, 陈臣, 陈谌, 陈辰, 陈陈, 陳晨, 陳陈, and 陳陳