Coll (letter)

Ogham letters
	Aicme Beithe		Aicme Muine
ᚁ	Beith	ᚋ	Muin
ᚂ	Luis	ᚌ	Gort
ᚃ	Fearn	ᚍ	nGéadal
ᚄ	Sail	ᚎ	Straif
ᚅ	Nion	ᚏ	Ruis
	Aicme hÚatha		Aicme Ailme
ᚆ	Uath	ᚐ	Ailm
ᚇ	Dair	ᚑ	Onn
ᚈ	Tinne	ᚒ	Úr
ᚉ	Coll	ᚓ	Eadhadh
ᚊ	Ceirt	ᚔ	Iodhadh
	Forfeda
ᚕ	Éabhadh
ᚖ	Ór
ᚗ	Uilleann
ᚘ	Ifín	ᚚ	Peith
ᚙ	Eamhancholl

Coll is the Irish name of the ninth letter of the Ogham alphabet ᚉ, meaning "hazel-tree", which is related to Welsh collen pl cyll, and Latin corulus. Its Proto-Indo-European root was *kos(e)lo-. Its phonetic value is [k].^[1]

References

1. McManus, Damian (1991). A Guide to Ogam. Maynooth Monographs 4. Co. Kildare, Ireland: An Sagart. p. 37. ISBN 1-870684-75-3. ISSN 0790-8806. The name of the ninth letter of the alphabet is the word for 'hazel-tree', Old Irish coll, cognate with Welsh collen pl. cyll hazel-tree(s), Latin corulus from the root *kos(e)lo-. The etymology confirms /k/ (as opposed to /kʶ/, see the next letter) as the value of this letter in Primitive Irish.