Rațiu is a Romanian-language ethnonymic surname. It derives from the Hungarian-language term rác ("Rascian", a historical term for Serbs).Janitsek Jenő, "A magyar eredetű román családnevekről", In: Az V. magyar névtudományi konferencia előadásai (Miskolc, 1995. augusztus 28–30). Szerk. B. GERGELY PIROSKA–HAJDÚ MIHÁLY. MNyTK 209. sz. Bp.–Miskolc. 1: 101–107.Alexandru Cristureanu, "Istoria reflectată în antroponima și toponimia județului Sălaj", in Acta Mvsei Porolissensis, Vol. IX, 1985, p. 758 Notable people with the surname include:

the noble Augustin Rațiu (1884–1970) Basiliu Rațiu (1783–1870) Ioan Rațiu (1828–1902) Ion Rațiu (1917–2000), Romanian newspaper editor and politician Mircea-Dimitrie Rațiu (1923–2011) Nicolae Rațiu (1856–1932) Tudor Ratiu (born 1950), Romanian-American mathematician Alin Rațiu, Romanian former football player Alexander Ratiu (1916–2002), Romanian Greek-Catholic priest Andrei Rațiu (born 1998), Romanian footballer Cosmin Rațiu, Romanian rugby union player Daniela Rațiu, Romanian handball player George-Adrian Ratiu, Romanian swimmer Miron Rațiu, Romanian conductor and music educator Tudor Ratiu, Romanian-American mathematician

See also

Rațiu, a village in Tășnad town, Satu Mare County, Romania

References