Where does “colum” come from?

colum (Middle Irish) comes from Old Irish columb, from Latin columba, from Ancient Greek κόλυμβος, from Ancient Greek κολυμβάω — to dive, plunge; dive, plunge headlong, swim; I...

Ancestry of “colum”, step by step

Step	Language	Word	Meaning
1	Old Irish	columb	dove
2	Latin	columba	dove, pigeon; a term of endearment
3	Ancient Greek	κόλυμβος	Alternative form of κολυμβῐ́ς; Alternative form...
4	Ancient Greek	κολυμβάω	to dive, plunge; dive, plunge headlong, swim; I...

Every word from Ancient Greek κολυμβάω →Every word from Ancient Greek κόλυμβος →Every word from Latin columba →