Meaning: it's either from Eustachius, a Latin form of Greek Eustachys meaning "fruitful" from Greek elements eu (good) and stachus (ear of corn); or it could be from Eustathius, a Latinized form of Eustathios meaning "well-built" or "good stability" from Greek elements eu (good) and histemi (to stand up, to set up).
Nicknames: Stace, Stacy/Stacey
- Eustache (French)
- Efstathios (Modern Greek)
- Eustachio (Italian)
- Eustaquio (Spanish, Portuguese)