Where does “sláviček” come from?

sláviček (Slovak) comes from Slovak slávik, from Proto-Slavic solvьjь, from Proto-Slavic solvъ, from Proto-Indo-European saluo-.

Ancestry of “sláviček”, step by step

StepLanguageWordMeaning
1Slovaksláviknightingale
2Proto-Slavicsolvьjьnightingale
3Proto-Slavicsolvъyellowish-gray
4Proto-Indo-Europeansaluo-—
Every word from Proto-Indo-European saluo- →Every word from Proto-Slavic solvъ →Every word from Proto-Slavic solvьjь →