All around the world, Gladdis (Gladdis 
) is a very rare principally feminine, but scarcely masculine given name. The forename Gladdis is habitual in Argentina, where it is a very rare girly name, Philippines, where it is a very rare primarily female, but scarcely male name, and Nigeria, where it is an extremely rare feminine name. In absolute terms, it is commonest in Philippines, the United States, and Nigeria. Likewise, Gladdis is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Gladdis | Argentina, Philippines, United Kingdom, Nigeria, United States |