Flower:
* 백합 (baekhap): This is the most common way to write "lily" in Korean, referring to the flower.
Name:
* 릴리 (rilli): This is the romanized spelling of the English name "Lily" and is commonly used when referring to someone named Lily.
So, if you're talking about the flower, use 백합 (baekhap). If you're talking about the name, use 릴리 (rilli).