"Donahue, Mary Eleanor"@en . "Mary Elinor Donahue"@en . "Elinor Donahue"@en . . . "Mary Eleanor Donahue"@en . . "1942Z"^^ . "Mary Eleanor Donahue (born April 19, 1937), best known as Elinor Donahue, is an American actress. She played Robert Young's and Jane Wyatt's eldest child, Betty Anderson, on Father Knows Best, a 1950s sitcom."@en . . "1937-04-19Z"^^ . "Donahue, Elinor"@en . "Actress" . "1942Z"^^ . . "1937Z"^^ .