Here is a list of characters from Peanuts from the following site:

http://www.lowchensaustralia.com/names/peanuts.htm

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Charlie Brown: the principal character

Charlotte Braun: the original Charlie Brown's counterpart

Snoopy: Charlie Brown's dog

Linus van Pelt: Charlie Brown's best friend

Lucy van Pelt: Linus' sister

Woodstock: Snoopy's best friend

Sally Brown: Charlie Brown's younger sister

Marcie: the bespectacled character

Peppermint Patty: Marcie's best friend

Schroeder: the piano-playing character

Franklin: the first African-American character

Pig-Pen: the dirtiest character

Frieda: the only player in Charlie Brown's baseball team not to wear a cap

Rerun van Pelt: Linus' brother

Eudora: a young neighbour of Charlie's. She played on his baseball team.

The Kite-Eating Tree: a deciduous tree of indeterminate type

Lila: the original owner of Snoopy

Miss Othmar: Linus van Pelt's schoolteacher (he had a crush on her)

Patty: Violet's closest friend

Peggy Jean: one of Charlie's girlfriends

José Peterson: a player in the baseball team - he started his own team

Poochie: a blonde girl who played with Snoopy when he was younger

Roy: he introduced Charlie to Peppermint Patty. They met at summer camp

Shermey: the baseball team's designated hitter

Joe Shlabotnik: Charlie's favourite baseball player

Andy: Snoopy's brother

Marbles: Snoopy's brother

Olaf: Snoopy's brother

Spike: Snoopy's brother

Belle: Snoopy's sister

Thibault: (pronounced Tee-bo) he always caused trouble for Charley & Patty

The Little Red-Haired Girl: Charlie Brown's crush

The Great Pumpkin: delivered presents to good children.

The Head Beagle: he refused to chase a rabbit.

Violet Gray: one of Patty's best friends

Woodstock: the bird that befriended Snoopy
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You can read more about Peanuts in the following page:
http://en.wikipedia.org/wiki/Peanuts

My favourite character is snoopy and I had a dog named Snoopy too :)