Family name Kaysor (Kaysor 
) , all around the world, is an extremely rare cognomen. The cognomen Kaysor is habitual in the United Kingdom, where it is an extremely rare surname, and the United States. Much more prevalently, Kaysor is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaysor | United Kingdom, Bangladesh, Italy, United States, India |