Where does “Suomenlinna” come from?

Suomenlinna (Finnish) comes from Finnish Linna, from Proto-Finnic litna — town, city; fortification, fortress.

Ancestry of “Suomenlinna”, step by step

Suomenlinna traces back through two separate lines of ancestry.

via Finnish Linna

StepLanguageWordMeaning
1FinnishLinnacastle large fortified residential building
2Proto-Finniclitnatown, city; fortification, fortress

via Finnish Suomen

StepLanguageWordMeaning
1FinnishSuomenFinland's, Finnish
Every word from Proto-Finnic litna →Every word from Finnish Linna →