Where does “Elster” come from?

Elster (English) comes from German Elster, from Middle High German elster, from Old High German agalstra, from Proto-West Germanic agastrijā, from Proto-West Germanic ag-ad- ~ ag-at-, from Proto-West Germanic agu, from Proto-Germanic agō, from Proto-Indo-European h₂oḱ-éh₂ — sharp.

Ancestry of “Elster”, step by step

StepLanguageWordMeaning
1GermanElstermagpie
2Middle High Germanelster—
3Old High Germanagalstra—
4Proto-West Germanicagastrijāmagpie
5Proto-West Germanicag-ad- ~ ag-at-—
6Proto-West Germanicagumagpie
7Proto-Germanicagō—
8Proto-Indo-Europeanh₂oḱ-éh₂—
9Proto-Indo-Europeanh₂eḱ-sharp

Words derived from “Elster”

Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European h₂oḱ-éh₂ →Every word from Proto-Germanic agō →