Where does “теткиште” come from?

теткиште (Macedonian) comes from Macedonian тетка, from Proto-Slavic tetъka, from Proto-Slavic teta — aunt.

Ancestry of “теткиште”, step by step

StepLanguageWordMeaning
1Macedonianтеткаaunt
2Proto-Slavictetъka—
3Proto-Slavictetaaunt
Every word from Proto-Slavic teta →Every word from Proto-Slavic tetъka →Every word from Macedonian тетка →