The famous Snoopy from Peanut has a total of 7 siblings; Andy, Marbles, Olaf, Spike, Molly, Rover and Belle. They had appeared in over 70 strips at various times.
Briefly introduce them from left to right of the above animation snap shot. Andy, he is distinguished by his shaggy coat, but otherwise looks like Snoopy. Marbles, the smartest and also the quiet one in the family. Spike, the thinner looking Snoopy with whiskers, he live alone in cactus. Then there is Snoopy, next to him is Olaf, also known as the "Ugly Dog" as he had won the ugly dog contest. Molly and Rover were never mentioned by name in the comic strip, they play the dobro and the mandolin in the TV special Snoopy's Reunion. Lastly Belle, she is known for making bows, a lots of people mistakenly thought that she was Snoopy's girlfriend.
** Thumbnail: Peanuts (c) 1994 PNTS (Snoopy and his siblings (from left to right) Andy, Spike, Snoopy and Olaf. )
** Snap Shot: 1991 TV special Snoopy's Reunion