Where does “lunatyczka” come from?

lunatyczka (Polish) comes from Polish lunatyk, from Latin lūnāticus, from Latin lūna, from Old Latin losna, from Proto-Italic louksnā, from Proto-Indo-European lówksneh₂, from Proto-Indo-European lewḱ-, from Proto-Indo-European lewk- — bright; to shine; to see.

Ancestry of “lunatyczka”, step by step

StepLanguageWordMeaning
1Polishlunatyksleepwalker
2LatinlūnāticusOf, or living on, the moon
3Latinlūna—
4Old Latinlosna—
5Proto-Italiclouksnāmoon
6Proto-Indo-Europeanlówksneh₂moon
7Proto-Indo-Europeanlewḱ-lynx
8Proto-Indo-Europeanlewk-bright; to shine; to see
Every word from Proto-Indo-European lewk- →Every word from Proto-Indo-European lewḱ- →Every word from Proto-Indo-European lówksneh₂ →