early 12c., "royal crown," from Anglo-French coroune, Old French corone (13c., Modern French couronne), from Latin corona "crown," originally "wreath, garland," related to Greek korone "anything curved, kind of crown," from suffixed form of PIE root *sker- (2) "to turn, bend." Old English used corona, directly from Latin.
Extended to coins bearing the imprint of a crown (early 15c.), especially the British silver 5-shilling piece. Also monetary units in Iceland, Sweden (krona), Norway, Denmark (krone), and formerly in German Empire and Austria-Hungary (krone). Meaning "top of the skull" is from c. 1300. Crown-prince is 1791, a translation of German kronprinz.
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