Where does “Kymenlaakso” come from?

Kymenlaakso (English) comes from Finnish Kymenlaakso, from Finnish Laakso, from Finnish laakso, from Proto-Finnic lakso — (wet) valley, depression.

Ancestry of “Kymenlaakso”, step by step

StepLanguageWordMeaning
1FinnishKymenlaakso—
2FinnishLaaksoAny of a number of small places in Finland
3Finnishlaaksovalley
4Proto-Finniclakso(wet) valley, depression
Every word from Proto-Finnic lakso →Every word from Finnish laakso →Every word from Finnish Laakso →