Yaropolk m Russian (Rare)Derived from the Slavic elements
jarŭ "fierce, energetic" and
pŭlkŭ "people, host". This name was borne by two rulers of Kievan Rus (10th and 12th centuries).
Yaroslav m Russian, UkrainianMeans
"fierce and glorious", derived from the Slavic elements
jarŭ "fierce, energetic" and
slava "glory". Yaroslav the Wise was an 11th-century grand prince of Kyiv who expanded Kievan Rus to its greatest extent.
Yasen m BulgarianMeans both
"ash tree" and
"clear, serene" in Bulgarian.
Yekaterina f RussianRussian form of
Katherine. This name was adopted by the German princess Sophie of Anhalt-Zerbst in 1744 shortly before she married the future Russian emperor Peter III. She later overthrew her husband and ruled as empress, known as Catherine the Great in English.
Yevpraksiya f Russian (Rare)Russian form of
Eupraxia. This was the name of a daughter of Vsevolod I, grand prince of Kyiv, who became the wife of the Holy Roman emperor Henry IV.
Yuriy m Russian, Ukrainian, BelarusianRussian, Ukrainian and Belarusian form of
George. This name was borne by Yuriy Dolgorukiy, a 12th-century grand prince of Kyiv. The Soviet cosmonaut Yuriy (or Yuri) Gagarin (1934-1968), the first man to travel to space, was another famous bearer of this name.