Why is the Czech Republic also called Czechia?

The name "Czechia" is the official informal English name for the Czech Republic, a designation promoted by the Czech government since 2016.1

It serves as a direct translation of the Czech informal name Česko, which gained widespread usage following the dissolution of Czechoslovakia at the end of 1992. The government's guidance encourages the use of "Czechia" in contexts where short names are naturally used for other countries, mirroring how nations like France or Germany are referred to by their common names rather than their formal political titles.1