Where does “kollen” come from?

kollen (Cornish) comes from Cornish koll, from Proto-Brythonic *köll, from Latin cōleus, from Ancient Greek κολεός, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “kollen”, step by step

StepLanguageWordMeaning
1Cornishkollhazel trees
2Proto-Brythonic*kölltesticle
3Latincōleussack (scrotum or testicles)
4Ancient Greekκολεόςa sword-sheath, a scabbard; a cinerary urn; a...
5Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European ḱel-Every word from Ancient Greek κολεόςEvery word from Latin cōleus