When Duchess Euphemia of Czersk-Warsaw was born in 1310, in Sochaczew, Sochaczew, Masovia, Poland, her father, Trojden I Piast Duke of Czersk, was 26 and her mother, Maria Rurykowicz Princess of Galicia, was 17. She married Duke Casimir I of Cieszyn before about 19 August 1324. They were the parents of at least 5 sons and 4 daughters. She died on 11 January 1374, in Cieszyn, Hrubieszów, Lublin, Poland, at the age of 64.
German: possibly a metonymic occupational name for a fisherman, from orfe, a species of freshwater fish. Alternatively, a habitational name from Urff near Kassel, formerly Orpha.
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