Closest Sound:
* Sintia: This is the closest pronunciation to Cynthia in Hawaiian.
* Sinthia: This is another option for a close pronunciation.
Meaning-Based:
* Hinahina: This name means "beautiful, shining" and could evoke a similar sentiment as Cynthia, which means "moon goddess."
* Lani: This means "sky" or "heaven," and could be used to capture a similar ethereal quality as Cynthia.
Other Considerations:
* Cynthia: You could simply use the name Cynthia, as it's easily pronounceable in Hawaiian.
Ultimately, the best way to spell Cynthia in Hawaiian depends on your preference and the context.