East Slavic (Russian Екатерина) form of the Greek name Catherine means - "purity, clarity, clearness, forever pure; virginal".
Catherine II, also known as Catherine the Great (Russian: Екатерина II, Yekaterina II Velikaya; German: Katharina die Große), Empress of Russia (2 May 1729 - 17 November [O. S. 6 November] 1796), was the most renowned and the longest-ruling female leader of Russia, reigning from 9 July [O.S. 28 June] 1762 until her death at the age of 67. She was born in Stettin, Pomerania, Prussia as Sophie Friederike Auguste von Anhalt-Zerbst-Dornburg, and came to power following a coup d'état and the assassination of her husband, Peter III, at the end of the Seven Years' War. Russia was revitalised under her reign, growing larger and stronger than ever and becoming recognised as one of the great powers of Europe.