surname, (kokuji)
蘰 is a rare kokuji used as a surname. Its standalone meaning is unclear beyond that name usage.
蘰 is a Japanese kokuji, likely created by combining 艹 (grass) with 縵 (possibly for sound or meaning). The exact historical development is uncertain.
The grass top 艹 over 縵 suggests a plant-related name. Picture a family crest with a distinctive grass design: 蘰 is a surname.
For かつら, imagine a person named Katsura wearing a wig made of grass: Katsura -> かつら, and the grass top 艹 ties to the name.
—