In the world, Auster (Auster 
, Ostro 
, Ostrea 
) is a rare primarily masculine, but very seldom female first name. The given name Auster is habitual in Philippines, where it is a very rare primarily masculine, but very infrequently feminine name, Indonesia, where it is a very rare boy's name, and Brazil, where it is a very rare primarily boy's, but very seldom girly name. More prevalently, Auster is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Auster | United States, France, Norway, Philippines, Germany |
| Ostro | Australia, United Kingdom, United States, France, Norway |
| Ostrea | New Zealand, United States, Switzerland, Philippines, Canada |
| Аустер | Ukraine, Russia, Kazakhstan |