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This dog appeared with Charlie Brown, Lucy, Sally, Pigpen, and the gang in the Peanuts comic strip.
Who is Snoopy.
Note: According to the Charles M. Shultz museum, Peanuts' creator Shultz didn't like the title of his comic strip. He originally named it Li'l Folks, but when it went into syndication, United Feature Syndicate feared copyright infringement, they chose Peanuts from a list of possible names, probably based on the "Peanut Gallery" from the Howdy Doody Show.