Opalka

== English == === Etymology === Borrowed from Czech Opálka or Polish Opałka. === Proper noun === Opalka (plural Opalkas) A surname. ==== Statistics ==== According to the 2010 United States Census, Opalka is the 35622nd most common surname in the United States, belonging to 631 individuals. Opalka is most common among White (96.99%) individuals. === Further reading === Hanks, Patrick, editor (2003), “Opalka”, in Dictionary of American Family Names, volume 3, New York: Oxford University Press, →ISBN.