If you mean "sandy" as in referring to sand:
* Oneʻa: This means "sand" in Hawaiian. You could say "Oneʻa ʻāina" (meaning "sandy land") or "Oneʻa kahakai" (meaning "sandy beach").
If you mean "Sandy" as a name:
* Sani: This is a simple, phonetic approximation of "Sandy".
* Keone: This means "sand" and could be used as a nickname for "Sandy".
* A name that has similar meaning or sound: You could choose a Hawaiian name with a similar meaning or sound to "Sandy", such as "Sandara" or "Sana".
Ultimately, the best way to say "Sandy" in Hawaiian depends on the specific context and your personal preference.