Question: Who played violet rutherford on leave it to beaver?

Disambiguated questions and answers:
context: Judy Hensler (Jeri Weil, October 4, 1957 – October 15, 1960) is Beaver's snitching, goody-goody classroom nemesis on the show. Penny Woods (Karen Sue Trent, February 20, 1960 – January 20, 1962) filled the nemesis role when Judy was dropped. Other friends include Lumpy's sister Violet Rutherford, (Wendy Winkleman, 1957 and Veronica Cartwright, February 19, 1959 – May 2, 1963). Benjie Bellamy (Joey Scott) and Chuckie Murdock (Rory Stevens) are both small boys and Cleaver neighbors who cause trouble. Beaver's notorious classmate Angela Valentine is an unseen character, mentioned a dozen times in the series but never shown on screen.
question: Who played violet rutherford on leave it to beaver in 1957?
short_answers: Wendy Winkleman
wikipage: Leave It to Beaver characters
context: Judy Hensler (Jeri Weil, October 4, 1957 – October 15, 1960) is Beaver's snitching, goody-goody classroom nemesis on the show. Penny Woods (Karen Sue Trent, February 20, 1960 – January 20, 1962) filled the nemesis role when Judy was dropped. Other friends include Lumpy's sister Violet Rutherford, (Wendy Winkleman, 1957 and Veronica Cartwright, February 19, 1959 – May 2, 1963). Benjie Bellamy (Joey Scott) and Chuckie Murdock (Rory Stevens) are both small boys and Cleaver neighbors who cause trouble. Beaver's notorious classmate Angela Valentine is an unseen character, mentioned a dozen times in the series but never shown on screen.
question: Who played violet rutherford on leave it to beaver in February 19, 1959 – May 2, 1963?
short_answers: Veronica Cartwright
wikipage: Leave It to Beaver characters

Long-form answers:
knowledge: content: Other friends include Lumpy's sister Violet Rutherford, (Wendy Winkleman, 1957 and Veronica Cartwright, February 19, 1959 – May 2, 1963). Benjie Bellamy (Joey Scott) and Chuckie Murdock (Rory Stevens) are both small boys and Cleaver neighbors who cause trouble.
wikipage: Leave It to Beaver characters
content: His pals include Tooey Brown, Chester Anderson, the awkward Clarence "Lumpy" Rutherford, and smart-aleck Eddie Haskell. Wally comes down hard on both Lumpy and Eddie when they pick on Beaver. 
wikipage: Leave It to Beaver characters
content: Leave It to Beaver is an American television sitcom broadcast between 1957 and 1963 about an inquisitive and often naïve boy, Theodore "The Beaver" Cleaver (Jerry Mathers), and his adventures at home, school, and around his suburban neighborhood.
wikipage: Leave It to Beaver
long_answer: In the American television sitcom, Leave It to Beaver, Clarence "Lumpy" Rutherford's sister, Violet Rutherford, was played by Wendy Winkleman in 1957 and then by Veronica Cartwright from February 19, 1959, to May 2, 1963.
knowledge: content: Leave It to Beaver is an American television sitcom broadcast between 1957 and 1963 about an inquisitive and often naïve boy, Theodore "The Beaver" Cleaver (Jerry Mathers), and his adventures at home, school, and around his suburban neighborhood.
wikipage: Leave It to Beaver
content: Veronica Cartwright (born 20 April 1949) is a British-born American actress who has worked mainly in US film and television in a career spanning six decades.
wikipage: Veronica Cartwright
long_answer: Leave It to Beaver is an American television sitcom broadcast between 1957 and 1963 about an inquisitive and often naïve boy, Theodore "The Beaver" Cleaver played by Jerry Mathers, and his adventures at home, school, and around his suburban neighborhood. Other friends include Lumpy's sister Violet Rutherford, played Wendy Winkleman in 1957, Veronica Cartwright, a British-born American actress, played Violet Rutherford from February 19, 1959 to May 2, 1963.