Where does “ruudunsäästäjä” come from?

ruudunsäästäjä (Finnish) comes from Finnish säästäjä, from Finnish jä, from Proto-Finno-Ugric *ja, from Proto-Germanic jahw, from Proto-Germanic -hw, from Proto-Germanic -hwe, from Proto-Indo-European -kʷe — and; Forms distributives from interrogatives.

Ancestry of “ruudunsäästäjä”, step by step

ruudunsäästäjä traces back through two separate lines of ancestry.

via Finnish säästäjä

StepLanguageWordMeaning
1Finnishsäästäjäsaver
2Finnishjäice
3Proto-Finno-Ugric*ja—
4Proto-Germanicjahwand, also
5Proto-Germanic-hwand; Forms distributives from interrogatives
6Proto-Germanic-hwe—
7Proto-Indo-European-kʷeand; Forms distributives from interrogatives

via Finnish ruutu

StepLanguageWordMeaning
1Finnishruutusquare; rectangle; box
2Swedishrutasquare, tile; windowpane; panel
3Middle Low Germanrūte—
4Old High Germanrūta—
5Latinrūtarue bitter herb
6Ancient Greekῥυτήrue
Every word from Proto-Indo-European -kʷe →Every word from Proto-Germanic -hw →Every word from Proto-Germanic jahw →