Where does “broterelis” come from?

broterelis (Lithuanian) comes from Proto-Balto-Slavic brā́ˀtē, from Proto-Indo-European bʰréh₂tēr — brother.

Ancestry of “broterelis”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavicbrā́ˀtēbrother
2Proto-Indo-Europeanbʰréh₂tērbrother
Every word from Proto-Indo-European bʰréh₂tērEvery word from Proto-Balto-Slavic brā́ˀtē