Throughout the world, น้ำหวาน (Namwan 
, Sarmwai , น้ำหวาน) is a very rare dominantly feminine, but infrequently masculine first name. The first name น้ำหวาน is characteristic of Thailand, where it is a very rare feminine name, and India, where it is an extremely rare unisex name. More prevalently, น้ำหวาน is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Namwan | Norway, Nigeria, Thailand, India, Myanmar |
| Sarmwai | Thailand |
| Sweetnam | United Kingdom, South Africa, Ireland, United States, Canada |
Aqui, Naluewan, Namburt, Nambutre, Namgasorn, Namgyart, Nammiwan, Namniml, Namnlum, Namonwan, Namparm, Namphusa, Namsaard, Namsawnag, Namsawsng, Namsawut, Namsua, Namsuey, Namsuntiey, Namswan, Namtie, Namvarn, Namwaan, Namwahn, Namwai, Namwaing, Namwak, Namwandee, Namwann, Namwansa, Namwarn, Namwee, Namwhann, Namwomg, Narmsutto, Narmwan, Narmyee, Narmyot, Nasrinee, Natoan, Ngammuean, Ngamwanrobroo, Ngamwean, Ngarmsard, Nhompan, Nramwan, Numnin, Numsoy, Numwan, Nyampong,