Question: Who is Mary Williams (Activist)'s maternal grandfather?
Sentence (from "Jane Fonda"): Born to actor Henry Fonda and socialite Frances Ford Seymour, Fonda made her acting debut with the 1960 Broadway play "There Was a Little Girl", for which she received a nomination for the Tony Award for Best Featured Actress in a Play, and made her screen debut later the same year with the romantic comedy "Tall Story".
Relevant evidence: Yes