Sarek. You’re also confusing Jane Wyman and Jane Wyatt. Wyman as Amanda also played the mother on “Father Knows Best.” Wyatt was Reagan’s first wife and was mostly in films, but was back in prominence as the star of TV’s “Falcon Crest” when her ex was in the White House.
You have them backwards. Wyatt was Spock’s mother and the mom on Father Knows Best. Wyman was married to Reagan.