Where does “länsisuomi” come from?

länsisuomi (Finnish) comes from Finnish länsi, from Proto-Finnic länci, from Proto-Finnic lanci — lowland.

länsisuomi (Finnish): Western Finnish; the western dialects of the Finnish language, possibly viewed as a separate language from a diachronic (but not a synchronic) point of view

Definitions

  1. Western Finnish; the western dialects of the Finnish language, possibly viewed as a separate language from a diachronic (but not a synchronic) point of view

Ancestry of “länsisuomi”, step by step

länsisuomi traces back through two separate lines of ancestry.

via Finnish länsi

StepLanguageWordMeaning
1Finnishlänsiwest; the West
2Proto-Finniclänciwest
3Proto-Finniclancilowland

via Finnish suomi

StepLanguageWordMeaning
1FinnishsuomiThe Finnish language; Third-person singular...
2Proto-Finnicsoomiperson from Southwest Finland
Every word from Proto-Finnic lanci →Every word from Proto-Finnic länci →Every word from Finnish länsi →