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Kasia

♀ Girl

Pronounced KAH-shah /ˈkɑ.ʃɑ/Medium

Meaning: Polish pet form of Katarzyna (Katherine) — from Greek katharos, 'pure'Medium

In 30 seconds: Pure: Kasia is the Polish pet of Katherine — 'pure'. Soft, sweet, and warm (said 'KAH-shah').

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Origin MediumGreek, Polish

MeaningPolish pet form of Katarzyna (Katherine) — from Greek katharos, 'pure'

U.S. rank (2024)#5687 ↗ Rising

2024 U.S. births22 girls (0.00% of U.S. girls)

Peak year2002

Total births (all-time)≈ 1,702

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

Kasia is the affectionate Polish pet form of Katarzyna (Katherine) — from Greek katharos, 'pure, clean'. A soft, sweet, much-loved name across Poland (the 'si' said 'sh', so 'KAH-shah').

In the U.S. it appears in Polish families. Rare, pure at the root, and sweet.

Did you know? Katherine means 'pure' (Greek katharos) — Kasia is its beloved Polish pet form, soft and sweet (the s said 'sh', so 'KAH-shah').

Overall data confidence 72%

Behind the Name — Kasia — root etymology

Variations

KatarzynaKasienka

Nicknames

Kaska

Famous Bearers

Famous bearers coming soon.

If you like Kasia…

Zosia— another Polish pet name

Gaia— shares the -ia ending

Sonia— shares Kasia's Greek roots

Lidia— a similarly popular pick

Cassia— another Greek name

Explore names like Kasia

By themegreek nickname-name polish

By meaningPurity

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Frequently Asked

What does the name Kasia mean?

Kasia is the Polish pet of Katherine — Greek 'pure'.

How do you pronounce Kasia?

It's said KAH-shah /ˈkɑ.ʃɑ/ — two syllables, stress on the first (the si is 'sh').

Is Kasia a boy or girl name?

Kasia is a girl's name.

How popular is Kasia?

Kasia is a rare name in the U.S.