This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
嵰 combines 山 (mountain) with 兼, which likely contributes a phonetic element. The exact historical development is uncertain.
The kanji has 山 (mountain) on the left and 兼 on the right. Without a known meaning, picture a mountain that serves two purposes at once, like a peak that is both a landmark and a shelter.
For ケン, imagine Ken the mountain climber standing on a peak shaped like 兼: Ken -> ケン.