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Etymology

The English name Switzerland is a portmanteau of Switzer, an obsolete term for a Swiss person which was in use during the 16th to 19th centuries, and land. The English adjective Swiss is a loanword from French Suisse, also in use since the 16th century. The name Switzer is from the Alemannic Schwiizer, in origin an inhabitant of Schwyz and its associated territory, one of the Waldstätte cantons which formed the nucleus of the Old Swiss Confederacy. The Swiss began to adopt the name for themselves after the Swabian War of 1499, used alongside the term for "Confederates", Eidgenossen (literally: comrades by oath), used since the 14th century. The data code for Switzerland, CH, is derived from Latin Confoederatio Helvetica (Helvetic Confederation).

The toponym Schwyz itself was first attested in 972, as Old High German Suittes, perhaps related to swedan 'to burn' (cf. Old Norse svíða 'to singe, burn'), referring to the area of forest that was burned and cleared to build. The name was extended to the area dominated by the canton, and after the Swabian War of 1499 gradually came to be used for the entire Confederation. The Swiss German name of the country, Schwiiz, is homophonous to that of the canton and the settlement, but distinguished by the use of the definite article (d'Schwiiz for the Confederation, but simply Schwyz for the canton and the town). The long of Swiss German is historically and still often today spelled ⟨ y ⟩ rather than ⟨ ii ⟩, preserving the original identity of the two names even in writing.

The Latin name Confoederatio Helvetica was neologised and introduced gradually after the formation of the federal state in 1848, harking back to the Napoleonic Helvetic Republic. It appeared on coins from 1879, inscribed on the Federal Palace in 1902 and after 1948 used in the official seal (e.g., the ISO banking code "CHF" for the Swiss franc, the Swiss postage stamps ('HELVETIA') and the country top-level domain ".ch", are both taken from the state's Latin name). Helvetica is derived from the Helvetii, a Gaulish tribe living on the Swiss Plateau before the Roman era.

Helvetia appeared as a national personification of the Swiss confederacy in the 17th century in a 1672 play by Johann Caspar Weissenbach.