Surname แสงจันทร์ (แสงจันทร์ 
, Sangchan 
, Saengchan 
, among others...) , in the entire world, is a common cognomen. The cognomen แสงจันทร์ is characteristic of Thailand, where it is quite a common surname, Laos, where it is quite a rare surname, and Finland, where it is a rare surname. Measured by absolute frequency, it is commonest in Thailand, Laos, and the United States. Likewise, แสงจันทร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| แสงจันทร์ | Thailand |
| Sangchan | Thailand, Laos, United States, South Korea, India |
| Saengchan | Germany, Finland, Thailand, United States, Malaysia |
| Sangjan | Hungary, Thailand, Laos, United States, India |
| Saengjan | Thailand, United Kingdom, India, United States, Malaysia |
Leangjalurn, Moonlamom, Moonlight, Moonming, Moonsaat, Moonsadaeng, Moonsaeng, Moonsamai, Moonsamrauj, Moonsamruaj, Moonsan, Moonsang, Moonsao, Moonsap, Moonsapha, Moonsarn, Moonsarp, Moonsilp, Moonsin, Moonsithi, Moonsongkho, Moonsran, Moonsrap, Moonsrinuan, Moonsung, Moonsunthiah, Moonsurin, Moonthade, Moonwan, Roungchan, Roungmoung, Saeangjan, Saengchaen, Saengchak, Saengchammong, Saengchand, Saengchanda, Saengchandr, Saengchang, Saengchanh, Saengchankhao, Saengchankhum, Saengchans, Saengchanto, Saengchantr, Saengchantra, Saengchantranant, Saengchong, Saengchueng, Saengchung, Saengchut, Saengdoen, Saenghan, Saengjhan, Saengjun, Saengkhen, Saenglam, Saenglit, Saengmoon, Saengngenon, Saengruan, Saengsang, Saengsank, Saengsichan, Saengyaem, Saenlit, Sanengchan, Sangchandra, Sangchang, Sangchantr, Sangchaun, Sangchunth, Sangchurng, Sangkhaindra, Sangkhen, Sangsanor, Sangsichan, Sangsijan, Sangsijun, Saungchan, Seangchan, Seangchant, Seangmoon, Seangwarn, Sengchan, and Sengchanh