Thaddeus Sivana Jr. appears in 38 issues.
Dr. Sivana is a scientific genius and is one of Captain Marvel's archenemies. He has also been involved with other heroes in the DC universe, and is regularly seen as part of supervillain team-ups.
Daughter of criminal mastermind Thaddeus Bodog Sivana, Georgia has followed in her father's footsteps with a sharp interest in science.
Venus Sivana is the wife of Doctor Sivana and stepmother to Magnificus, Beautia, Thaddus Jr. and Georgia.
This edit will also create new pages on Comic Vine for:
Until you earn 1000 points all your submissions need to be vetted by other
Comic Vine users. This process takes no more than a few hours and we'll
send you an email once approved.
Use your keyboard!
Log in to comment