Here are some options:
Similar-sounding names:
* Reina: This is a Spanish name that is similar to Regina and means "queen."
* Regan: This is an Irish name that is also similar to Regina.
Names with similar meaning:
* Aliʻi: This means "chief" or "noble" in Hawaiian.
* Mōʻī: This means "king" or "queen" in Hawaiian.
* Lani: This means "sky" or "heaven" in Hawaiian, and can also be used as a title for a ruler.
Ultimately, the best way to say "Regina" in Hawaiian depends on the context and the specific meaning you want to convey.