Robert O'Neill
Full Name
Robert O'Neill
Male Human (Irish)
Date of Birth/Current Age as of 2013
April 29, 2008 (5 years old)
Place of Birth/Current Residence
Possibly born in Republic of Ireland; Currently resides in Appleton, Wisconsin, United States of America
Interests, Friends, and Enemies
Currently unknown
Family Members
Chloe O'Neill (mother)
Ethan O'Neill (father)
Dillon O'Neill (brother)
Aaron O'Neill (brother)
Rachel O'Neill (paternal grandmother)
Paul O'Neill (paternal grandfather)
Gertrude Conner (aunt)
Nicholas Conner (uncle)
Lauren Conner (cousin)
Amy Conner (cousin)
Maureen McReary-Wilson (aunt)
Aiden McReary (deceased uncle; Maureen's first husband)
Hector Wilson (uncle, Maureen's current husband)
Francis McReary (cousin)
Patrick McReary (cousin)
Gerald McReary (cousin)
Derrick McReary (cousin)
Kate McReary (cousin)
Aiden Wilson (cousin)
Emily O'Neill and Sophie MacCaurthy (maternal great-grandmothers)
William O'Neill and Richard MacCaurthy (maternal great-grandfathers)
Cameron O'Neill (uncle)
First Appearance
"Uncle Cameron Moves In" (first appearance in Sibling Rivalries)
"I'm the happiest five year-old alive!"
―Robert O'Neill

Robert O'Neill is a minor character in Sibling Rivalries. He is the youngest son of Ethan and Chloe O'Neill, and the younger brother of Dillon and Aaron. He is also the cousin of the McReary siblings, which are the main protagonists of the series. Robert is 5 years old, and was the youngest grandson of Rachel and Paul O'Neill, until Aiden Wilson was born seven years later. Dillon currently resides with his family (as well as his uncle Cameron O'Neill) in Appleton, Wisconsin.


  • Robert is the third youngest character in the franchise, with Rose Parker being the second youngest, and Aiden Wilson (who is Robert's cousin) being the youngest.
  • Robert was born on the date Grand Theft Auto IV was released.


Sibling Rivalries Pre-Series


Sibling Rivalries Main Series