This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
眀 is a rare character that visually combines 目 (eye) and 月 (moon), but its exact historical origin and original meaning are uncertain.
The left side is an eye 目 and the right side is the moon 月. Picture an eye trying to see by moonlight, but the meaning remains unclear.
For ベイ, imagine a bay where moonlight reflects on the water, and an eye tries to see it: bay -> ベイ.