Rerun van Pelt is Linus and Lucy's younger brother in Charles M. Schulz's comic strip "Peanuts". He is named when Lucy van Pelt, his sister, calls the situation (his birth) a 'rerun' of what happened with her brother, Linus van Pelt. Linus decides to name him that.

Rerun started as a minor character in the "Peanuts" universe, only becoming a main character in the last decade of the comic strip. Rerun was first mentioned in the strip on May 23, 1972, during a storyline in which Lucy threw Linus out of the house only to learn that yet another little brother had just been born.

Initially, toddler Rerun was shown playing cards with an equally confused Snoopy, and learning to tie his shoes from Lucy. He was rarely used in the 1980s; by that time, Schulz had run out of ideas about how to use him. By 1996, Rerun had aged to 5 years old and reluctantly entered kindergarten, so he was still younger than the other characters in the Peanuts gang.

More Info: en.wikipedia.org