Where does “butterflybush” come from?

butterflybush (English) comes from English Butterfly, from Middle English boterflye, from Old English buterflēoge, from Old English butere, from Proto-West Germanic buterā, from Latin būtȳrum, from Ancient Greek βούτυρον, from Ancient Greek τυρός — to swell; to crowd; to be strong.

Ancestry of “butterflybush”, step by step

butterflybush traces back through two separate lines of ancestry.

via English Butterfly

StepLanguageWordMeaning
1EnglishButterflyA flying insect of the order Lepidoptera, distinguished from moths by their diurnal activity and generally brighter colouring
2Middle Englishboterflyebutterfly; Something of little import or value; A...
3Old Englishbuterflēogebutterfly
4Old Englishbuterebutter
5Proto-West Germanicbuterābutter
6Latinbūtȳrumbutter
7Ancient Greekβούτυρονbutter
8Ancient Greekτυρόςcheese
9Proto-Hellenictūróscheese
10Proto-Indo-Europeantuh₂-ró-s
11Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong

via English Bush

StepLanguageWordMeaning
1EnglishBushA place name
2Middle Englishbushgrove, wood; thicket, underbrush; bush; branch of...
3Old Englishbusċ
4Latinboscafirewood
5Late Latinbusca
6Proto-West Germanicbuskbush, thicket
7Proto-Germanicbuskazbush; thicket
8Proto-Indo-EuropeanbʰuH-to become, grow, appear
Every word from Proto-Indo-European tewh₂-