Ostap

♂ Boy

Pronounced OH-stahp /ˈoʊ.stɑp/Medium

Meaning: A Ukrainian form of Eustace/Eustathius — from the Greek, variously 'steadfast; stable; standing firm' and 'fruitful' (eu, 'good', + stachys, 'fruitful ear of grain')Low

In 30 seconds: Steadfast; fruitful; stable: Ostap is a Ukrainian form of Eustace. Crisp, classic, and warm (said 'OH-stahp').

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Origin LowGreek, Ukrainian

MeaningA Ukrainian form of Eustace/Eustathius — from the Greek, variously 'steadfast; stable; standing firm' and 'fruitful' (eu, 'good', + stachys, 'fruitful ear of grain')

U.S. rank (2025)#7547 ↗ Rising

2025 U.S. births11 boys (0.00% of U.S. boys)

Peak year2025

Total births (all-time)≈ 47

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Ostap is a Ukrainian form of Eustace/Eustathius — from the Greek, variously 'steadfast; stable; standing firm' and 'fruitful' (eu, 'good', + stachys, 'fruitful ear of grain'). A crisp, classic name (said 'OH-stahp').

In the U.S. it appears in Ukrainian families. Rare, steadfast-and-fruitful at the root, and classic.

Did you know? Eustace/Eustathius is variously 'steadfast; stable' and 'fruitful' in Greek — Ostap is the Ukrainian form, crisp and classic (said 'OH-stahp').

Overall data confidence 42%

References — Ostap — Ukrainian form of Eustace

Variations

EustaceOstapko

Nicknames

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Famous Bearers

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Frequently Asked

What does the name Ostap mean?

Ostap is a Ukrainian form of Eustace — Greek, variously 'steadfast; stable' and 'fruitful'.

How do you pronounce Ostap?

It's said OH-stahp /ˈoʊ.stɑp/ — two syllables, stress on the first.

Is Ostap a boy or girl name?

Ostap is a boy's name.

How popular is Ostap?

Ostap is a very rare name in the U.S.