• Max Oertli
• Aylmer Oka
• ​Marlene Oka​
• Roxanne Oka
• Thomas Oka-Bird
• Bernadette Oka-Black Water
• Hailey Oka-Dillon
• Mavis Oka-Mitchell
• Araya (Wolf Child) Old Shoes
• Viola Joyce Old Shoes
• Sandra Old Shoes-Small Eyes
  
• ​Anna Louise Olsen​
• Ben Olsen
• June Olsen​
• ​Keith Olsen
• Mary Ann Olsen
• Taylor Olsen
• Thomas Olsen
• Wayne Vance Olsen
• Derek Olson
• James "Bob" Olson
• Marlene Olson
• Lorna Olson-Payne
• Jeannine Orr​
• Lynda Orr
• Shirley Orr
• Frances Ostrup