Beata

From Memory Alpha, the free Star Trek reference.

Beata was the Elected One, or ruler, of the planet Angel I in 2364. The society on the planet was a matriarchal culture with men relegated to second-class status. As head of the government, Beata was intent on preserving the matriarchal culture. She allowed the USS Enterprise-D to locate the survivors of the freighter Odin that were on the planet. Beata considered them fugitives because they refused to accept the female government. But she stated that as long as they left the planet, she would be satisfied. They refused to leave, since they have taken wives on the planet. Beata sentenced them all to death.

She was attracted to Commander William T. Riker, who gave her an Albeni meditation crystal as a present. Despite the fact that he's a male, Riker impressed Beata. He persuaded her not to execute the fugitives. She exiled them and their wives to a remote region of the planet. (TNG: "Angel One")

Beata was played by actress Karen Montgomery.