Surname רידלי (Ridley 
, רידלי 
) , throughout the world, is a common cognomen. The cognomen רידלי is characteristic of the United Kingdom, where it is quite a common surname, Australia, where it is quite a rare surname, and New Zealand. In absolute terms, it is the most numerous in the United States, the United Kingdom, and Australia. Much less frequently, רידלי is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ridley | Australia, South Africa, Canada, United Kingdom, United States |
| רידלי | Israel |