This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
儙 combines the person radical 亻 with 遣, which likely contributes sound. The exact historical development and original meaning are uncertain.
A person 亻 beside 遣, a component associated with dispatching or sending. The meaning is unclear, but you can imagine a person being sent away or dispatched.
For ケン, picture a person named Ken being dispatched: Ken -> ケン, and the person radical 亻 reinforces the image of Ken the messenger.