Úath
The first letter of the H group, one stroke to the left of the stem line. The manuscripts give it the sound h and call it the whitethorn; what it first stood for is unknown, and its name may mean fear.
Meaning
Úath is a single stroke to the left of the line, the letter the second group is named after: Aicme hÚatha. The medieval key reads it as h and its name as the whitethorn. Damian McManus, as the Ogham in 3D project at the Dublin Institute for Advanced Studies summarises him, points out that there is no evidence for an initial h in Irish at any period, so the manuscripts’ H “seems to be based on Latin h”, in his words “no more than a cosmetic solution to the problem created by the loss of the original initial consonant”. Unicode encodes the letter as U+1686 OGHAM LETTER UATH.
Origin and history
The Auraicept na nÉces explains the whitethorn by a kenning, “a meet of hounds is huath”, or else “because it is formidable owing to its thorns”. The Word Ogham of Mac ind Óc, copied in In Lebor Ogaim, points to a different word: “blanching of face”, fear, “for blanched is a man’s face when he is encompassed with fear or terror”. The Auraicept also sets h apart from every other letter: full power is in all of them “with the exception of h”.
What sound was it?
No one knows for certain. Ogham in 3D gives its value with a query, perhaps a y sound, and says that the H, NG and Z letters are “so poorly attested in ogham inscriptions on stone” that their first values cannot be fixed. Deborah Hayden and David Stifter of the OG(H)AM project set out the views: Peter Schrijver suggested that the name is the Old Irish word úath, “fear, terror”, and the alternative the post prefers is that the letter was first J, “yod”, a sound lost before Old Irish, so that úath continues the Greek and Latin letter name iōta. Encyclopaedia Britannica takes the letters for h and z, “which are not used in Irish”, as evidence against a purely Irish origin for the script.
A weak tree
Even as a tree name úath is doubtful. Hayden and Stifter note that the usual Old Irish word for the whitethorn is scé.
Write in ogham
stringmash.comOgham translatorWrite English in ogham, the early Irish alphabet of strokes cut along an edge, with the full ogham chart.Read next
- Next in OghamDairThe second letter of the H group, two strokes to the left of the stem line, for the sound d. Its name, dair, means oak.
- The same shape in Chinese radicalsCǎo 艸The character for ‘grass’, and radical 140 of the 214 Kangxi radicals, under which the names of plants and flowers are filed.
See also
Beithe, Luis, Fern, Sail, Nin, Tinne.
Sources
- Ogham in 3D: alphabet, Ogham in 3D (2013 edition), letter names after Damian McManus, A Guide to Ogam (1991) and Ériu 39 (1988), Dublin Institute for Advanced Studies, alphabet; Letter names, Aicme hÚatha; Origins
- Auraicept na n-éces: the scholars' primer, George Calder (ed. and trans.), 1917: the Ogham tract from the Book of Ballymote and the Yellow Book of Lecan, with In Lebor Ogaim, John Grant, Edinburgh (Internet Archive), Auraicept, pp. 91, 93; In Lebor Ogaim, pp. 279, 285
- Ogam and trees, Deborah Hayden and David Stifter, 20 December 2022, OG(H)AM project, University of Glasgow and Maynooth University, §2, hÚath
- Ogham writing (Encyclopaedia Britannica), Britannica Editors, “ogham writing”, Encyclopaedia Britannica, Encyclopaedia Britannica (Wayback Machine copy, 2025), Introduction
- Ogham (Unicode code chart U+1680–U+169F), The Unicode Standard, code chart for the Ogham block, Unicode Consortium, U+1686
The same shape elsewhere
Browse symbols formed from letters and numbers or lines.
Researched, edited and approved by Rory Hansen before publishing. Last reviewed October 9, 2026. How we research
Added .