Jonas' father
The Venture Bros. character
First appearance

Escape to the House of Mummies Part II (mentioned)
Occupation Super-scientist
Relatives Colonel Lloyd Venture (father)
Jonas Venture Sr. (son)
Dr. Thaddeus Venture (grandson)
Jonas Venture Jr. (grandson)
The Monarch ("blood relative")
Hank Venture (great-grandson)
Dean Venture (great-grandson)
Dermott Fictel (great-grandson)

Jonas' father is a character who has been referenced, but never seen, on the series The Venture Bros. His last name is presumably Venture, though his first name has not been given.


Colonel Lloyd Venture was an adventurer, super-scientist, and milliner who belonged to the original Guild, a Gilded Age predecessor to the current Guild of Calamitous Intent. He had a son, name currently unknown, who was also a super-scientist.

That son fathered the famed super-scientist Jonas Venture Sr., who himself sired Dr. Thaddeus "Rusty" Venture and Jonas Venture, Jr.

Episode Appearances

Season 2

Season 4


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