Globally, Astier (استير 
, Asterius 
, Astier 
) is a rare unisex first name. The given name Astier is habitual in Sudan, where it is a rare girly name, Tanzania, where it is a rare masculine name, and Syria, where it is a rare girly name. Measured by absolute frequency, it is the most numerous in Tanzania, Egypt, and Sudan. More frequently, Astier is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| استير | Iraq, Egypt, Iran, Sudan, Syria |
| Asterius | Tanzania, India, United States, Indonesia, Germany |
| Astier | Colombia, France, Ethiopia, Reunion, Argentina |
Astier is also a name for the fictitious and mythical characters: Asterius , the fictional character from Is It Wrong to Try to Pick Up Girls in a Dungeon?; Asterius ; Asterius , the Argonaut, son of Hyperasius; Asterius and Asterius , the mythical figure of Miletus, among other works.