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Shaggy's Family Tree
Baby Willikers
Shaggy's Cousin
The infant of Betsy and Jamison P. Willikers that is only seen in 1 panel of the comic in a carrier on Betsy's back.
Appearance:
DC Scooby-Doo Comic #63

Betsy Willikers
Shaggy's Cousin
Jamison P. Willikers wife.
Appearance:
DC Scooby-Doo Comic #63

Betty Lou Shaggbilly
Shaggy's cousin
Betty Lou Shaggbilly is a hillbilly. She is from the south.
Appearance:
The Hoedown Showdown (The Scooby-Doo/Scrappy-Doo/Puppy Hour)

Dapper Jack Rogers
Shaggy's Ancestor
The greatest outlaw thought to be an evil ginslinger who's ghost came back to terrorize the town. The story was that him and his dog Atlas were cattle thieves and bank robbers and they stole from everyone.
Appearance:
Scooby-Doo! Shaggy's Showdown

Fearless Shagaford
Shaggy's uncle
Fearless Shagaford own the Fearless Detective Agency.
Appearance:
Dumb Waiter Caper (The Scooby-Doo/Scrappy-Doo/Puppy Hour) (Mentioned)
The Comic Book Caper (The Scooby-Doo/Scrappy-Doo/Puppy Hour) (Mentioned)
Disappearing Car Caper (The Scooby & Scrappy-Doo Puppy Hour)

Frederick Rufus Rogers-Dinkley
Shaggy & Velma's Son
Shaggy and Velma's son in Scooby-Doo! Apocalypse. Daphne is his godmother and Scooby is his godfather. He is named after Fred Jones.
Appearance:
Scooby Apocalypse #36

Gaggy Rogers
Shaggy's uncle
Voice: Alan Young
Gaggy likes to play practical jokes. He is the owner of Whoopsy-Doo, Scooby's cousin.
Appearance:
Wedding Bell Boos part 1 and 2 (The All New Scooby and Scrappy Doo Show)

Grammy Rogers
Shaggy's Grandmother
She lives at Shady Sunshine Retirment Village.
Appearance:
Night of the Upsetting Shorts (Be Cool, Scooby-Doo!)

Great Grandfather Nathaniel
Shaggy's Great Grandfather
We only see a picture of him in the episode.
Appearance:
The Loch Ness Mess (The New Scooby-Doo Movies)

Great Grandpa Willikers
Shaggy's Great Great Grandfather
Jamison P. Willikers Great Grandpa, who would most likely be related to Shaggy as Jamison and Great Grandpa have the same last name.
Appearance:
DC Scooby-Doo Comic #63

Great Great Grandfather Benjamin
Shaggy's Great Great Grandfather
We only see a picture of him in the episode.
Appearance:
The Loch Ness Mess (The New Scooby-Doo Movies)

Great Great Grandmother Matilda
Shaggy's Great Great Grandmother
We only see a picture of her in the episode.
Appearance:
The Loch Ness Mess (The New Scooby-Doo Movies)

Great Uncle Nathaniel
Shaggy's great-uncle
Shaggy called him Uncle Nat and they look very similar. Uncle Nat built a bridge to add color to the town.
Appearance:
The Loch Ness Mess (The New Scooby-Doo Movies)

Henry Rogers
Shaggy's Grand Uncle
He was an archaeologist.
Appearance:
DC Scooby-Doo #19 (Comic)

Jamison P. Willikers
Shaggy's Cousin
He owns a farm.
Appearance:
DC Scooby-Doo Comic #63

Jenny Willikers
Shaggy's Cousin
Jamison P. and Betsy Willikers daughter.
Appearance:
DC Scooby-Doo Comic #63

Maggie Rogers
Shaggy's sister
In a Pup Named Scooby-Doo, Maggie is portrayed as a baby named "Sugey".
Appearance:
Wedding Bell Boos part 1 and 2 (The All New Scooby and Scrappy Doo Show)

McBaggy Rogers
Shaggy's ancestor
McBaggy Rogers was a pilgrim who came to Plymouth, Massachusetts aboard the Mayflower in 1620 with his dog Yankee Doodle Doo. According to his diary, McBaggy Rogers buried a priceless indian treasure on the Shaggy's parents property.
Appearance:
Wedding Bell Boos part 1 and 2 (The All New Scooby and Scrappy Doo Show)

Mr. & Mrs. Samual Chastain "Mom and Pops" Rogers
Shaggy's parents
Voice: Mr. Rogers:
Casey Kasem (Wedding Bell Boos)
Mrs. Rogers:
BJ Ward (Wedding Bell Boos)
Shaggy's father is a police officer. They own Dada and Momsy Doo.
Appearance:
Wedding Bell Boos part 1 and 2 (The All New Scooby and Scrappy Doo Show)
The Baby Sitter From Beyond (A Pup Named Scooby-Doo)

Rudolph Igotcha
Shaggy's Distant Cousin
He is a vampire who lives in a castle.
Appearance:
Charlton Comics Scooby-Doo...Where Are You! #2

Salty Rogers
Shaggy's Uncle
He was a fisherman.
Appearance:
Scooby-Doo (Archie Comics) #17

Stetson Rogers
Shaggy's Cousin
He owned a dude ranch.
Appearance:
DC Scooby-Doo #6 (Comic)

Tawny Rogers
Shaggy's Third Cousin Twice Removed
Voice: Melissa VillaseƱor
She owns the Crazy Q Ranch in Sorghum City.
Appearance:
Scooby-Doo! Shaggy's Showdown

Uncle Albert Shaggleford
Shaggy's uncle
Voice: Casey Kasem
Uncle Albert is a nanotechnology researcher. In Shaggy and Scooby-Doo Get a Clue!, Scooby and Shaggy live in Uncle Albert's mansion.
Appearance:
The Shaggy and Scooby-Doo Get a Clue Series

Uncle Beauregard
Shaggy's uncle
Voice: William Callaway
Uncle Beauregard is Shaggy's southern, civil war era uncle. He is deceased.
Appearance:
Scooby-Doo Meets the Boo Brothers

Uncle Olaf
Shaggy's Uncle
He owned a resort hotel.
Appearance:
Charlton Comics Scooby-Doo...Where Are You! #3

Uncle Shagworthy
Shaggy's uncle
Uncle Shagworthy is rich and live in a castle that he shipped over from England to New England and put back together stone by stone. His most precious possession is food, and he keeps it in a safe. He looks like Shaggy and has the same appetitie.
Appearance:
Scared Alot in Camelot (The Scooby-Doo Show)

Uncle Shoogy
Shaggy's Uncle
He owned a surf shop.
Appearance:
DC Scooby-Doo Comic #87

Uncle Shug
Shaggy's Uncle
He owned a construction company.
Appearance:
DC Scooby-Doo #97 (Comic)

Uncle Zooty
Shaggy's Uncle
He was a poet.
Appearance:
DC Scooby-Doo Comic #89

Wilfred
Shaggy's brother-in-law
Wilfred is Maggie's husband.
Appearance:
Wedding Bell Boos part 1 and 2 (The All New Scooby and Scrappy Doo Show)

Williker Sons
Shaggy's Cousins
Jamison P. and Besty Willikers sons.
Appearance:
DC Scooby-Doo Comic #63