Comment by closewith

> The Republic of Ireland' is the official descriptive term for the country named 'Ireland' in English, per the Republic of Ireland Act 1948.

The context is important. The Act revoked dominion status and role of the British Crown in the Irish executive branch, thus making Ireland a republic, and so deserving of a new description (the previous having been the Irish Free State).

Czechia is the only way I've heard the country referred to (in the news as it rarely comes up in person).