Where does “Landau” come from?

Landau (Polish) comes from German Landau, from Proto-West Germanic auwju, from Proto-Germanic awjō, from Proto-Germanic agwjō, from Proto-Indo-European h₂ékʷeh₂ — water.

Ancestry of “Landau”, step by step

StepLanguageWordMeaning
1GermanLandau—
2Proto-West Germanicauwjufloodplain; meadow; island
3Proto-Germanicawjōfloodplain; meadow; island
4Proto-Germanicagwjō—
5Proto-Indo-Europeanh₂ékʷeh₂water
Every word from Proto-Indo-European h₂ékʷeh₂ →Every word from Proto-Germanic agwjō →Every word from Proto-Germanic awjō →