Dillon O'Neill
Full Name
Dillon O'Neill
Male Human (Irish)
Date of Birth/Current Age as of 2013
February 2, 2002 (11 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
Sports (football in particular)
Most likely a 6th Grade student at an unknown school
Family Members
Chloe O'Neill (mother)
Ethan O'Neill (father)
Aaron O'Neill (brother)
Robert 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)
―Dillon O'Neill

Dillon O'Neill is a minor character in Sibling Rivalries. He is the oldest son of Ethan and Chloe O'Neill, and the older brother of Aaron and Robert. He is also the cousin of the McReary siblings, which are the main protagonists of the series. Dillon is an athlete, much like his cousin Gerald "Gerry" McReary, and loves playing football.

Dillon currently resides with his family (as well as his uncle Cameron O'Neill) in Appleton, Wisconsin.


  • He and Patrick "Packie" McReary (the main protagonist of the series) are one month apart, although Dillon's personality is more similar to that of Gerry.
  • Dillon is one of only two characters in the franchise that has freckles, the other being Salvador Real (although Sal only appears with freckles in the prequels).


Sibling Rivalries Pre-Series


Sibling Rivalries Main Series