This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
僔 combines 亻 (person) with 尊, which likely contributes sound. The exact historical development is uncertain.
A person 亻 beside 尊, a shape associated with respect or a vessel. Without a clear meaning, picture a person standing respectfully, but remember the meaning is uncertain.
For ソン, imagine a son standing respectfully beside a noble vessel: son -> ソン, and the person 亻 is the son.