Where does “리투아니아” come from?

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

Ancestry of “리투아니아”, step by step

Step	Language	Word	Meaning
1	English	Lithuania	—
2	Medieval Latin	Līthuānia	—
3	Proto-Slavic	Litъva	—
4	Old Lithuanian	Lietuva	—