Which country's name, means land of the free?

Liberia

The name Liberia stands for "liberty" or "Land of the Free" as the country was colonized by freed African American slaves in 1822, and founded the country in 1847 with the support of Government of the United States creating a new ethnic group called the Americo-Liberians. [1] However, this introduction of a new ethnic mix compounded ethnic tensions with the additional sixteen other main ethnicities.[2]

Thailand

country means land free

Argentina means "Silver" in Latin. When the Spaniards came ashore the coasts of Argentina the natives brough them many and great gifts made out of Silver. And that was the beginning of the merciless killing of all natives in the land, sad but a true event in Argentinean history.

The United States of America

If you read or sing our national anthem, at the end it says "or the land of the free". In other words, America is the land of the free.