Nain would be na-in (nah-een) or 나인. The ㅇ is a place holder, and sometimes used for the sound "-ong." You can't write "Nain" in hangul without the place holder. It would come out like 나ㅣㄴwhich has no form, lol. It would look like "na i n."
아르와
창원
The word "lily" in Korean is written as 백합 (baekhap).
I guess your talking about Korean boy group singer beast. You write like this: 비스트
taekwondo is 태권도
내 가족 My family
영어 (yeong-eo)
임창원.
It would be written as 안.
신디 That's cindy.
As in the name Seth? Because there is no 'th' sound in the Korean language, you would have to write 셋, which is pronounced as set, and it also the same word as 'three' in Korean.
In Korean, the name "Sean" can be written as 션 (pronounced as "sheon") or 션 (pronounced as "seon").