Etymology: Derived from Japanese elements where 'ru' (る) can relate to flow or clarity, and 'ka' (か) often signifies light or fragrance; commonly written with kanji such as 瑠花 (lapis lazuli flower), 瑠香 (lapis lazuli fragrance), or 光 (light). The exact meaning depends on the kanji used, but most interpretations center around beauty, light, or preciousness.