Male Ukrainian name (Остап)
Ostap (Ukrainian: Остап) is a male name of Greek origin — the native Ukrainian form of Eustachius / Eustathius; it means «steadfast», «unshakeable», «one who stands firm».
The name derives from Ancient Greek Εὐστάθιος (Eustáthios), formed from εὖ (eu, «well») and ἵστημι (histēmi, «to stand, to stand firm»). The Ukrainian folk form Ostap arose through phonetic adaptation of Eustachius (via Yevstaf → Ostaf → Ostap); a classic example of folk etymology. In Christian tradition the name entered through the Great Martyr Eustathius Placidas (2nd century). Ostap holds a special place in Ukrainian culture thanks to Nikolai Gogol's novella «Taras Bulba» (1835), in which Taras's elder son — Ostap — embodies the ideal of the courageous Cossack warrior.
From Ancient Greek Eustáthios: eu («well») + histēmi («to stand») — «one who stands firm», «steadfast». The Ukrainian form arose via the phonetic adaptation Eustachius → Ostap.
Equivalents in other languages: Eustace (English), Eustache (French), Eustasio (Spanish), Eustachio (Italian), Eustathios (Greek), Eustachiusz (Polish), Yevstakhii / Yevstafii (Ukrainian, church), Stach (Polish short form).
Остапчик, Остапко, Остапушка, Ося, Осик, Осенька, Осічка.
| Nominative | Остап |
| Genitive | Остапа |
| Dative | Остапові |
| Accusative | Остапа |
| Instrumental | Остапом |
| Locative | Остапові |
| Vocative | Остапе |