Cognomen Ostrica (Ostrea 
, Ostrica 
) , worldwide, is a rare family name. The last name Ostrica is habitual in Slovakia, where it is quite a rare surname, Philippines, where it is a rare surname, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Philippines, Slovakia, and the United States. Very seldom, Ostrica is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ostrea | United Kingdom, Philippines, Switzerland, United States, Canada |
| Ostrica | Italy, United States, Slovakia |