Here are some options depending on your desired meaning:
* Closest Sound: You could use a name that sounds similar, like "Kalā" (pronounced "ka-LAH"). It's a common Hawaiian name and shares a similar sound to "Clark."
* Meaning: If you want to capture the meaning of "Clark" which is "scribe" or "secretary," you could use "Kākau" (pronounced "KAH-kow"), which means "to write" or "to scribe."
* Adaptation: You could adapt the name to Hawaiian pronunciation: "Kilaka". This might sound more familiar to Hawaiian speakers.
Ultimately, the best way to say "Clark" in Hawaiian depends on the context and your desired emphasis.