To some extent the question is ridiculous, since Hawaiian is written with the Latin alphabet. It's spelled "Ryan" just like it is in English, which also uses the Latin alphabet (it doesn't make sense to talk about how something is "spelled" in two languages that use the same alphabet).
However, Hawaiian doesn't have the same range of sounds that English does, and actually has only thirteen distinct letters, one of which is the glottal stop which isn't a letter in English. Like Japanese, in Hawaiian R and L are not distinct letters, and that sound is conventionally represented by L. Similarly, there's no Y, which in Ryan is simply standing in for the I sound anyway. Because of this, Lian is one possibility.
Since there is (kind of) an R sound (as opposed to a distinct letter) in Hawaiian, foreign words sometimes retain the R when written. The same is true for B, T, and V (usually written P, K, and W respectively in "pure Hawaiian") so Rian would be at least understood by a Hawaiian speaker (most Hawaiian speakers also speak English, so for that matter they wouldn't have any trouble withv"Ryan" itself).
The name "Ryan" would be spelled as "Laiana" in Hawaiian.
"Ryan" in Hawaiian is pronounced as "Laiana."
In Hawaiian, "Ryan" has no specific meaning as it is a name borrowed from other languages like English or Irish. It would simply be transliterated into the Hawaiian alphabet as Raiāna.
"Niki" would be spelled as "Niki" in Hawaiian since there is no specific Hawaiian translation for this name.
The Hawaiian phrase for "Ladies and Gentlemen" is "Ka Po'e Wāhine me nā Kāne."
In Hawaiian, "man" is spelled as "kāne."
In Hawaiian, "Ryan" has no specific meaning as it is a name borrowed from other languages like English or Irish. It would simply be transliterated into the Hawaiian alphabet as Raiāna.
"Ryan" in Hawaiian is pronounced as "Laiana."
Ryan = Lai'one
The Hawaiian phrase for "Ladies and Gentlemen" is "Ka Po'e Wāhine me nā Kāne."
April in Hawaiian
Spell Ryan in french
Mele Hawai'i
"Niki" would be spelled as "Niki" in Hawaiian since there is no specific Hawaiian translation for this name.
In Hawaiian, "savanna" is translated as "alani." Savanna refers to a grassy plain with widely spaced trees, while alani is a word used to describe areas with sparse vegetation and open spaces.
to say dead in hawaiian we say MAKI
Julie in Hawaiian is spelled "Iulie".
Natalie has no meaning in Hawaiian. Only Hawaiian names have meaning in Hawaiian. But you can spell it: Nakali