Kateryna

Kateryna comes from Greek, from Aikaterine, a name carried into Slavic languages long before anyone agreed on what it meant. The sense of "pure" was attached to the name later, once medieval writers linked it to the Greek word katharos. In Poland the same root gives Katarzyna, and from there the everyday Kasia, the name that fills any school register.

The Ukrainian form has its own weight. Taras Shevchenko titled one of his early poems Kateryna, published in 1838, telling of a village girl abandoned by a Russian officer. That poem fixed the name in Ukrainian memory as something tender and wronged.

So a Polish girl named Kateryna keeps a small border in her name. The spelling leans east, toward Kyiv, while Katarzyna stays home. Both mean the same thing on paper: pure, czysta. Say the diminutive and you are back in Poland, where Kasia answers to nobody's history but her own.