Fearn (letter)

	Ogham letters; ᚛ᚑᚌᚐᚋᚁᚂᚃᚓᚇᚐᚅ᚜
Aicme Beithe; ᚛ᚐᚔᚉᚋᚓᚁᚂᚃᚄᚅ᚜	Aicme Muine; ᚛ᚐᚔᚉᚋᚓᚋᚌᚍᚎᚏ᚜
Aicme hÚatha; ᚛ᚐᚔᚉᚋᚓᚆᚇᚈᚉᚊ᚜	Aicme Ailme; ᚛ᚐᚔᚉᚋᚓᚐᚑᚒᚓᚔ᚜
	Forfeda; ᚛ᚃᚑᚏᚃᚓᚇᚐ᚜

Fearn (ᚃ) is the Irish name of the third letter (Irish "letter": sing.fid, pl.feda) of the Ogham alphabet, meaning "alder-tree". In Old Irish, the letter name was fern [fʲer͈n͈], which is related to Welsh gwern(en), meaning "alder-tree(s)". Its Primitive Irish root was *wernā and its phonetic value then was [w]. Its Old Irish and modern phonetic value is [f].

Ogham letters ᚛ᚑᚌᚐᚋᚁᚂᚃᚓᚇᚐᚅ᚜
Aicme Beithe ᚛ᚐᚔᚉᚋᚓᚁᚂᚃᚄᚅ᚜			Aicme Muine ᚛ᚐᚔᚉᚋᚓᚋᚌᚍᚎᚏ᚜
ᚁ	[b]	Beith	ᚋ	[m]	Muin
ᚂ	[l]	Luis	ᚌ	[ɡ]	Gort
ᚃ	[w]	Fearn	ᚍ	[ɡʷ]	nGéadal
ᚄ	[s]	Sail	ᚎ	[st], [ts], [sw]	Straif
ᚅ	[n]	Nion	ᚏ	[r]	Ruis
Aicme hÚatha ᚛ᚐᚔᚉᚋᚓᚆᚇᚈᚉᚊ᚜			Aicme Ailme ᚛ᚐᚔᚉᚋᚓᚐᚑᚒᚓᚔ᚜
ᚆ	[j]	Uath	ᚐ	[a]	Ailm
ᚇ	[d]	Dair	ᚑ	[o]	Onn
ᚈ	[t]	Tinne	ᚒ	[u]	Úr
ᚉ	[k]	Coll	ᚓ	[e]	Eadhadh
ᚊ	[kʷ]	Ceirt	ᚔ	[i]	Iodhadh
Forfeda ᚛ᚃᚑᚏᚃᚓᚇᚐ᚜
	ᚕ	[ea], [k], [x], [eo]	Éabhadh
	ᚖ	[oi]	Ór
	ᚗ	[ui]	Uilleann
	ᚘ	[ia]	Ifín
	ᚙ	[x], [ai]	Eamhancholl
	ᚚ	[p]	Peith