Formal:
* Kānāwai: This literally means "law" but can also imply someone who follows rules of etiquette and decorum.
* ʻElele: This means "messenger" or "ambassador," suggesting someone with diplomatic skills and good manners.
Informal:
* Kānaka maikaʻi: This translates to "good person" or "kind person." It's a broader term but can encompass the qualities of a gentleman.
* Nui loa: This means "very big" or "great" and can be used to describe someone with a strong sense of honor and integrity.
Other:
* ʻOihana: This word means "work" or "profession" and can imply someone with good character and a strong work ethic.
* Akamai: This means "smart" or "wise," suggesting someone with good judgment and decision-making skills.
Ultimately, the best word to use will depend on the specific context and the nuance you want to convey.