From Proto-Tai *hoːjᶜ (“to hang down”). Cognate with Lao ຫ້ອຍ, Lü ᦠᦾᧉ (ḣoay²), Shan ႁွႆႈ (hāui), Ahom 𑜍𑜨𑜩 (roy).
| Orthographic | ห้อย h ˆ ɒ y | |
| Phonemic {Unorthographical; Short} | ฮ็่อย ɦ ˘ ˋ ɒ y | |
| Romanization | Paiboon | hɔ̂i |
| Royal Institute | hoi | |
| (standard) IPA(key) | /hɔj˥˩/(R) | |