Cognomen קיידי (Cady 
, Kadee 
, קיידי 
) , in the entire world, is a common last name. The family name קיידי is habitual in the United States, where it is quite a rare surname, Australia, where it is a rare surname, and France. Likewise, קיידי is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cady | Democratic Republic of the Congo, Australia, France, Egypt, United States |
| Kadee | Myanmar, India, Malaysia, United States, Saudi Arabia |
| קיידי | Israel |