to fly
仚 centers on the act of flying, with a visual emphasis on rising above a mountain.
仚 is a rare character combining 人 (person) above 山 (mountain), suggesting a person rising above a mountain, i.e., flying. The exact historical development is uncertain.
A person 人 stands on top of a mountain 山, ready to leap into the air and fly.
For ケン, imagine Ken the flying man soaring above the mountain: Ken -> ケン.