Eustathius
Eustathius or Eustathios is a Greek masculine given name, in English rendered Eustace. It may refer to:
- Saint Eustace, martyr
- Sint Eustatius, Dutch island in the Caribbean
- Eustathius of Antioch, Patriarch of Antioch
- Eustathius of Sebaste, Bishop of Sebastia in Armenia
- Eustathius of Cappadocia Neoplatonist, orator, and diplomat
- Eustathius (consul), Roman consul in 421
- Eustathius of Mtskheta, Georgian saint
- Eustathius of Epiphania, sixth-century Byzantine historian
- Eustathios (governor of the Cibyrrhaeot Theme), Byzantine governor
- Eustathios Maleinos, Byzantine general and magnate
- Eustathios Rhomaios, Byzantine jurist
- Eustathios Daphnomeles, Byzantine general
- Patriarch Eustathius of Constantinople from 1019 to 1025
- Eustathios Palatinos, Byzantine Catepan of Italy
- Eustathios Kymineianos, Byzantine eunuch
- Eustathios Makrembolites, Byzantine novelist
- Eustathius of Thessalonica, bishop famous for his commentaries on Homer
- Ewostatewos, Ethiopian saint
- Jevstatije I, Serbian saint
- Jevstatije II, Serbian saint