Where does “moonbeam” come from?

Moonbeam derives from Middle English mone and Old English bēam, tracing through Proto-Germanic mēnô and ultimately to Proto-Indo-European roots relating to measurement and mind.

moonbeam (English): A shaft of moonlight; Moonlight generally; Any of...

Definitions

  1. A shaft of moonlight; Moonlight generally; Any of...

Ancestry of “moonbeam”, step by step

moonbeam traces back through two separate lines of ancestry.

via English Moon

StepLanguageWordMeaning
1EnglishMoonThe Earth's moon; the sole natural satellite of the Earth, represented in astronomy and astrology by ☾
2Middle EnglishMoneA lamentation; a sorrowful moan or expression
3Old Englishmānbad, criminal, false; shameful act; crime;...
4Sanskritमहादेवthe "great God"
5Sanskritमहाcombining form of महत्; buffalo; great, large,...
6Proto-Indo-Aryanmaźʰā́
7Proto-Indo-Iranianmaȷ́ʰā́big, great
8Proto-Indo-Europeanméǵh₂sbig, great

via English beam

StepLanguageWordMeaning
1EnglishbeamAny large piece of timber or iron long in...
2Middle EnglishbeemA usually wooden beam or pole
3Old Englishbēamtree, cross, gallows, column, pillar, wood, beam,...
4Proto-West Germanicbaumtree; beam
5Proto-GermanicbaumazAlternative form of *bagmaz; tree, beam, balk;...
6Proto-Indo-Europeanbʰew-to grow, swell; to swell, wax, grow; to blow; to...
Every word from Proto-Indo-European méǵh₂s
moonbeam — Etymology, Origin & Word History | Etymology Explorer