Where does “duutsch” come from?

duutsch (Middle Dutch) comes from Old Dutch thiudisc, from Proto-West Germanic þiudisk, from Proto-Germanic þiudiskaz, from Proto-Germanic þeudō, from Proto-Indo-European tewtéh₂, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

Ancestry of “duutsch”, step by step

StepLanguageWordMeaning
1Old Dutchthiudiscof the people, vernacular
2Proto-West Germanicþiudiskof the people, popular, vernacular
3Proto-Germanicþiudiskazof the people, popular; of the tribe
4Proto-Germanicþeudōpeople, tribe
5Proto-Indo-Europeantewtéh₂people, tribe
6Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong

Words derived from “duutsch

Every word from Proto-Indo-European tewh₂-Every word from Proto-Indo-European tewtéh₂Every word from Proto-Germanic þeudō