This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
妧 combines 女 (woman) with 元, which likely contributes a phonetic role. The exact historical development is uncertain.
A woman 女 beside 元, but the meaning is uncertain. Perhaps imagine a woman of high origin or first rank, but this is speculative.
For ゲン, picture a woman named Gen standing beside a coin (元 means origin or yuan): Gen -> ゲン.