Where does “Diehl” come from?

Diehl (German) comes from Proto-West Germanic þeudu, from Proto-Germanic þeudō, from Proto-Indo-European tewtéh₂, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

Ancestry of “Diehl”, step by step

StepLanguageWordMeaning
1Proto-West Germanicþeudupeople, tribe
2Proto-Germanicþeudōpeople, tribe
3Proto-Indo-Europeantewtéh₂people, tribe
4Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong
Every word from Proto-Indo-European tewh₂- →Every word from Proto-Indo-European tewtéh₂ →Every word from Proto-Germanic þeudō →