In Charles M. Schulz's comic strip Peanuts, Snoopy was often stated to have seven siblings. Five appeared at various times in the strip: four brothers, Andy, Marbles, Olaf, and Spike; and one sister, Belle. The two others were never mentioned by name in the comic strip. According to the 1991 TV special Snoopy's Reunion, their names are Molly and Rover; however, their appearance is not considered canonical in the comic strip. In the June 6, 1959 comic strip, following the birth of Charlie Brown's sister Sally, Snoopy remarks that he has no brothers or sisters, and is an "only dog." However, in a March 18, 1971 strip, Snoopy writes in his autobiography: "I was born one bright Spring morning at the Daisy Hill Puppy Farm. I was one of eight puppies."
Their mother is called Missy, but has appeared only once in Peanuts, on July 26, 1996. A t-shirt that was sold for several years at Target and other stores shows Spike, Andy, Snoopy, Marbles and Olaf in a parody of the famous dogs playing poker print, despite much advertising copy which misidentified the characters.
Andy, Marbles, Olaf, Spike, and Belle appear briefly in during the credits of The Peanuts Movie.
Spike appeared most frequently in the strip. His appearance is similar to that of Snoopy, but he is substantially thinner, has a perpetually sleepy look, and sports a long, droopy mustache and a fedora. He sometimes wears Mickey Mouse shoes which were a gift from Mickey Mouse. He is called Snoopy's older brother during the first story in which he appears. Spike lives alone in the desert near Needles, California, only occasionally interacting with the principal characters in the strip, generally in visiting Snoopy. His friends are mostly inanimate saguaro cacti. In 1991's Snoopy's Reunion, Spike's home was a huge hollow saguaro in which he kept books and his fiddle. Spike is named after Charles Schulz's childhood dog.