Where does “roto” come from?

roto (Old Dutch) comes from Frankish rato, from Proto-Germanic rattaz, from Proto-Indo-European Hreh₃d- — to scrape.

Ancestry of “roto”, step by step

roto traces back through two separate lines of ancestry.

via Frankish rato

StepLanguageWordMeaning
1Frankishratorat
2Proto-Germanicrattazrat
3Proto-Indo-EuropeanHreh₃d-to scrape

via Frankish ratt

StepLanguageWordMeaning
1Frankishratt—
Every word from Proto-Indo-European Hreh₃d- →Every word from Proto-Germanic rattaz →Every word from Frankish rato →