Velma's Family Tree
Aunt Meg and Uncle Evan
Velma's aunt and uncle
Aunt Meg and Uncle Evan live in a small town.

Dave Walton
Velma's uncle
Appearance:
Watch Out! The Willawaw (The Scooby-Doo Show)

Marcy
Velma's cousin
Marcy is the daughter of Meg and Evan.

Mr. and Mrs. Dinkley
Velma's parents

Mrs. Dinkley
Velma's aunt
Mrs. Dinkley is the Chief Studio Accountant for Pirahna Studios. She was referred to as Mrs. Dinkley from Accounting. She was not in the episode, but was mentioned.
Appearance:
Lights! Camera! Monster! (What's New, Scooby-Doo?)

Thelma
Velma's aunt
Thelma works with dolphins at a marine institute.
Appearance:
Scooby Dude (A Pup Named Scooby-Doo)

Uncle Cosmo
Velma's uncle
Uncle Cosmo is an archaeologist.
Appearance:
The Ghosts of the Ancient Astronauts part 1 (The New Scooby-Doo Mysteries)
The Ghosts of the Ancient Astronauts part 2 (The New Scooby-Doo Mysteries)

Uncle Elmo
Velma's uncle
Uncle Elmo is a doctor.
Appearance:
Return of Commander Cool (A Pup Named Scooby-Doo)

Uncle John
Velma's uncle
Uncle John is archaeologist.
Appearance:
The Curse of the Viking Lake (The Scooby-Doo Show)