Family name O'Barr (O'Barr 
) , all over the world, is a rare cognomen. The family name O'Barr is habitual in Northern America, particularly the United States, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| O'Barr | United States |
|
james o'barr American graphic artist, US (b. 1960) |
|
| jean fox o'barr American feminist teacher, scholar (b. 1942) |
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Ann, Lucy, John, Jenn, Todd, Erin, Emma, Marie, Mandy, Merry, Lisa, Megan, Shane, Steve, Scott, Alvin, Allen, Chris, Carly, Camie, Clark, Sally, Greg, Dana, Ryan, Amy, Ben, Ken, Kim, Rod, Ron, Roy, Dan, Gus, Tim, Mary, Mark, Mike, Sara, Shea, Sean, Alex, Carl, Kris, Reva, Rick, Cindy, and Betty