Snoopy's siblings who have appeared in the Peanuts comic strip include brothers Spike, Marbles, Olaf, and Andy as well as his sister Belle. While sharing certain family resemblances, the siblings are all unique and distinct from one another, promising interesting and different characters and storylines. Due to Snoopy's immense popularity, it was only natural for Peanuts creator Charles Schulz to create more characters who resemble his famous beagle.

Interestingly, Schulz would come to regret introducing Snoopy's siblings into the Peanuts, lamenting that it took away the special quality of Snoopy being the only anthropomorphic animal who interacted consistently with the kids. Despite that, the Snoopy siblings would appear frequently for the rest of the strip's run, providing some hilarious comic strips.

10 "Two Right Turns And Twenty Three Wrong Ones"

A running gag for the Snoopy family is brothers Olaf and Andy getting lost. Trying to find their brother Spike's home, they constantly end up going off course. One time the pair even walk past Spike's house without even realizing that it's their brother's.

This funny strip makes fun of how directionally limited the two brothers are through Olaf's witty quip. Humorously using both uses of the word "right," Olaf jokes that they only took two right turns and all the rest were wrong ones. It tracks given how many times they have gotten lost, even in the easiest situations. At least the brothers have each other.

9 "How've You Been?"

Snoopy and Marbles were long-lost brothers for a time until their fateful reunion. As Peppermint Patty points out, a reunion after years of distance should result in an endless list of things to talk about. Yet, the most Snoopy and Marbles can come up with is polite "how are you"s. Snoopy isn't exactly a chatterbox, so it is fitting that the trait runs in the family.

Marbles first appeared in Peanuts in 1982, and has been noted to be the smartest of the Snoopy family. Also, he refuses to go along with Snoopy's flights of fantasy such as his imaginative adventures as the Red Baron. He instead prefers to point out the reality of the situation. As a result, Marbles could best be described as the Sheldon Cooper of the Snoopy family.

8 "Rosebud"

When Andy was introduced to the strip, he was always included with Olaf. The duo became an inseparable pairing in the strips and gained some trademarks of their own. For example, Olaf and Andy are always getting lost somewhere. This time, the duo manage to find themselves in Alaska instead of the desert.

That said, they do make the best of their time in the 49th state, getting jobs as sled dogs. For those who are unaware, the reference to Rosebud being a sled is a nod to the 1941 Orson Welles classic, Citizen Kane. Apparently in between getting lost and working, Olaf was able to catch a screening of the classic Hollywood film.

7 "I Still Haven't..."

Spike, Snoopy's desert-dwelling brother, explains his harrowing backstory to a cactus in this strip. The poor pup bares his soul to the plant, confiding in the cactus that he has never told anyone why he lives in the desert before, only to realize that he still hasn't told anyone.

When all alone in the desert for years on end, it's understandable that Spike would want to talk to someone, even if it is an inanimate plant. While the strip provides some comic relief, it also provides viewers with some information on the kind of sensitive dog that Spike is.

6 "Cats"

Snoopy is a dog that likes to march to the beat of his own drum. He likes to have different alter egos, he has a bird for a best friend, and he reads War and Peace at one word a day, just to name a few signature quirks. Peppermint Patty considers Snoopy weird and chooses to let Snoopy's brother Marbles know that when she introduces herself to him.

Marbles does not seem to mind though, going along with Patty to wait for Charlie Brown and Snoopy. Reading this strip, it looks like Marbles has some at least one quirk of his own: a fear of cats. Typically, dogs run after cats, not hide away from them. Yet, an apprehensive Marbles clings to the door before going inside, lest there be any cats in the house.

5 "Visitors"

Snoopy's stay in the hospital was one of the first appearances of some his siblings, including his brother Andy. In the strip, an under the weather Snoopy is in the hospital and when Charlie Brown rushes to the hospital to be by his dog's side, he finds that he already has a full room of visitors: his siblings.

While Andy claims animal instinct alerted them to Snoopy's condition, Olaf is a bit more honest that it was mostly luck. The siblings then dive into what happens after they die, to which Olaf and Andy are gobsmacked that this was ever a possibility for them. This shared surprise would pave the way for the adventures of Andy and Olaf to follow in future strips.

4 "Picture Time"

Snoopy has an active imagination. A little too imaginative, maybe, because Snoopy acts like his adventures as a World War I flying ace are true. Snoopy's siblings play along in his tall tales as well, as seen in this strip. Spike and Belle are playing a soldier and nurse, respectively, along with Snoopy's soldier character.

Snoopy is so proud of them that he feels the moment calls for documentation, and wants to send a picture to their mom and dad. While Snoopy has deluded himself into thinking his World War I adventures are true, he recognizes that many question his far-fetched stories, emphatically telling the story of him and his siblings whether people believe or not.

3 "Dogs On The Ground Abound"

Snoopy and Spike form a close brotherly bond once reunited, as Spike is the first of Snoopy's siblings to join the strip. First appearing as a minor character, Spike eventually became a major character in Peanuts, becoming the most frequently seen Snoopy sibling in the comics.

Often visiting Snoopy, Spike and his brother are understandably close. Based on this strip, they share a sense of humor too. When Linus walks by reciting a line from the Gertrude Stein poem From Four Saints in Three Acts, Snoopy replies with his own rhyme. From the reactions of the two brothers, it can be noted that they prefer Snoopy's line.

2 "Enemy Lines"

While most of Snoopy's siblings may be down to play pretend with him, there is an exception: Marbles. Snoopy's brother Marbles is the smartest of the family and prefers to be logical and methodological about everything. Consequently, Marbles does not jump into the imaginative fantasies of his brother.

In fact, based on this strip, it appears that Marbles is actually incapable of seeing the imagined versions that Snoopy visualizes. Marbles doesn't see an ambulance, he only sees a shopping cart driven by Lucy. Snoopy may not have the best playmate in Marbles, but his other siblings have as wild an imagination as Joe Cool himself.

1 "Perks Of Desert Living"

Spike can get a bit lonely in his desert life by Needles, California. He used to live with coyotes but since then he mainly stays on his own except when visiting his brother Snoopy. However, Spike likes to look on the bright side, not letting his solitude keep him down.

In this strip, Spike lists all the things he loves about living in the desert, including the beautiful desert scenery that is widely prized. Yet, Spike also lists great conversation as one of the perks of desert living despite having no one around him. In the next block the reader finds out that his great conversation partners are the rocks of the desert. Talk about one-sided conversations. It's these kinds of quirks that make Snoopy's siblings among the most underrated characters in Peanuts.