Where does “Tallinna” come from?

Tallinna (Finnish) comes from Estonian Tallinn, from Proto-Finnic litna — town, city; fortification, fortress.

Ancestry of “Tallinna”, step by step

StepLanguageWordMeaning
1EstonianTallinn
2Proto-Finniclitnatown, city; fortification, fortress
Every word from Proto-Finnic litnaEvery word from Estonian Tallinn