Where does “Letonia” come from?

Letonia (Romanian) comes from Romanian leton, from French letton — Latvian, the Latvian language; Latvian.

Ancestry of “Letonia”, step by step

StepLanguageWordMeaning
1RomanianletonLatvian
2FrenchlettonLatvian, the Latvian language; Latvian
Every word from French lettonEvery word from Romanian leton