Where does “Lëtwa” come from?

Lëtwa (Kashubian) comes from Proto-Slavic Litъva, from Old Lithuanian Lietuva.

Ancestry of “Lëtwa”, step by step

StepLanguageWordMeaning
1Proto-SlavicLitъva—
2Old LithuanianLietuva—
Every word from Old Lithuanian Lietuva →Every word from Proto-Slavic Litъva →