Ancient Greek origin
Source-reportedFrom the Old French form of Latin Eustathius, from Ancient Greek Εὐστάθιος (Eustáthios, “ancient name, also of Christian Saint”), from Ancient Greek εὐσταθής (eustathḗs, “steadfast, stable”). Or from εὔστᾰχῠς (eústăkhŭs, “fruitful”, literally “abundant in grain”), from εὖ (eû) + στάχυς (stákhus). Doublet of Ostap.
Sources for this account (2)
- Wiktionary: EustaceCC-BY-SA-4.0 · retrieved 2026-10-15
- French Wiktionary: EustaceCC-BY-SA-4.0 · retrieved 2026-10-14

