In the world, Keithley (Keithley 
) is a rare unisex given name. The first name Keithley is habitual in Philippines, where it is a rare gender-neutral name, the United Kingdom, where it is a very rare male name, and the United States, where it is a very rare mostly masculine, but seldom feminine name. More frequently, Keithley is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Keithley | Canada, Saint Kitts and Nevis, Philippines, United Kingdom, United States |