Where does “grüner Star” come from?

grüner Star (German) comes from German star, from English star, from Middle English sterre, from Old English steorra, from Proto-West Germanic sterrō, from Proto-Germanic sternô, from Proto-Indo-European h₂stḗr, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

Ancestry of “grüner Star”, step by step

grüner Star traces back through two separate lines of ancestry.

via German star

StepLanguageWordMeaning
1Germanstarstarling
2EnglishstarAny small luminous dot appearing in the cloudless...
3Middle Englishsterrestar
4Old Englishsteorrastar
5Proto-West Germanicsterrō
6Proto-Germanicsternôstar
7Proto-Indo-Europeanh₂stḗrstar
8Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth

via German Grün

StepLanguageWordMeaning
1GermanGrüngreen; vert; green in heraldry; leaves, a suit in...
2Middle High Germangrüene
3Old High Germangruonigreen; greenness
4Proto-West Germanicgrōnīgreen
5Proto-Germanicgrōnizgreen
6Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Indo-European h₂eHs-Every word from Proto-Indo-European h₂stḗrEvery word from Proto-Germanic sternô