This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
袨 combines the clothing radical 衤 with 玄, which likely contributes a phonetic element. The exact historical development is uncertain.
The clothing radical 衤 suggests a connection to garments, and 玄 (dark, profound) might hint at a formal or dark robe. Imagine a mysterious dark ceremonial robe.
For ケン, picture Ken wearing a formal robe: Ken -> ケン, and the robe is the 袨 garment.