Family name Irby-Harris (Irby-Harris 
) , in the entire world, is an extremely rare cognomen. The cognomen Irby-Harris is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Irby, and a last name Harris.
| VARIANT | COUNTRY |
|---|---|
| Irby-Harris | United States |