Where does “ragged robin” come from?

ragged robin (English) comes from English robin, from Middle English Robin, from Old French Robert, from Frankish berht, from Proto-Germanic berhtaz, from Proto-Germanic hrabnaz, from Proto-Indo-European ḱorh₂-, from Proto-Indo-European ḱer- — army.

ragged robin (English): A type of wild campion (Silene flos-cuculi, syn. Lychnis flos-cuculi), in the family Caryophyllaceae, which grows across Europe and has pink flowers

Definitions

  1. A type of wild campion (Silene flos-cuculi, syn. Lychnis flos-cuculi), in the family Caryophyllaceae, which grows across Europe and has pink flowers

Ancestry of “ragged robin”, step by step

ragged robin traces back through two separate lines of ancestry.

via English robin

StepLanguageWordMeaning
1EnglishrobinAny of various passerine birds of the families...
2Middle EnglishRobin
3Old FrenchRoberta Germanic (Old Frankish) borrowing
4Frankishberhtbright
5Proto-Germanicberhtazbright, shining
6Proto-Germanichrabnazraven
7Proto-Indo-Europeanḱorh₂-
8Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
9Proto-Indo-Europeankr̥-to turn, to bend
10Proto-Indo-Europeanker-army

via English ragged

StepLanguageWordMeaning
1EnglishraggedIn tatters, having the texture broken; Having...
2Middle Englishraggedragged, raggy, raglike; shaggy, furry; rough,...
3Old Norseraggaðrtufted
Every word from Proto-Indo-European ker-Every word from Proto-Indo-European kr̥-Every word from Proto-Indo-European ḱer-