Where does “ลิทัวเนีย” come from?

ลิทัวเนีย (Thai) comes from English Lithuania, from Medieval Latin Līthuānia, from Proto-Slavic Litъva, from Old Lithuanian Lietuva.

Ancestry of “ลิทัวเนีย”, step by step

StepLanguageWordMeaning
1EnglishLithuania—
2Medieval LatinLīthuānia—
3Proto-SlavicLitъva—
4Old LithuanianLietuva—
Every word from Old Lithuanian Lietuva →Every word from Proto-Slavic Litъva →Every word from Medieval Latin Līthuānia →