Where does “Piliukas” come from?

Piliukas (Lithuanian) comes from Lithuanian -ùkas, from Proto-Balto-Slavic -ukos.

Ancestry of “Piliukas”, step by step

StepLanguageWordMeaning
1Lithuanian-ùkas—
2Proto-Balto-Slavic-ukos—
Every word from Proto-Balto-Slavic -ukos →Every word from Lithuanian -ùkas →