Where does “Isometsä” come from?

Isometsä (Finnish) comes from Finnish iso, from Finnish isä, from Proto-Finnic icä, from Proto-Uralic ićä — father.

Ancestry of “Isometsä”, step by step

Isometsä traces back through two separate lines of ancestry.

via Finnish iso

StepLanguageWordMeaning
1Finnishisobig; large; great
2Finnishisäfather; Father
3Proto-Finnicicäfather
4Proto-Uralicićäfather

via Finnish metsä

StepLanguageWordMeaning
1Finnishmetsäforest, woods; bush; hunting
2Proto-Finnic*meccä—
3Proto-Balticmedjas—
Every word from Proto-Uralic ićä →Every word from Proto-Finnic icä →Every word from Finnish isä →