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Celtic Tree Calendar · Month 8 of 13

Holly, the month of the letter Tinne

Holly is the eighth of Graves' tree months, 8 July to 4 August, led by the Ogham letter Tinne, T. The medieval tracts gloss the letter as holly, though tinne means a bar of metal, and its kenning trian, a third, is the one that Calder left untranslated.

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The Ogham letter Tinne drawn upright on a stemline, three strokes to the left of the stemline, read from the bottom up; beside it the words Tinne, the Holly month, letter T, and the dates 8 July to 4 August. Tinne The Holly month · letter T 8 Jul to 4 Aug Old Irish tinne A medieval gloss Read from the bottom up
Tinne, the letter T, as it is cut on the stones: three strokes to the left of the stemline, read upwards. Drawn by us from its Unicode code point, not from a font.

Facts

Tree month
8 July to 4 August (Graves, 1948)
Days
28
Ogham letter
Tinne, the letter T (U+1688, OGHAM LETTER TINNE)
Old Irish name
tinne
The name means
a bar of metal
Letter and tree
A medieval gloss: the name means something else
Kenning (Morann)
trian, "a third": our gloss; Calder 1917, p. 279, leaves it untranslated
Medieval tree gloss
holly (cuileann) (Auraicept, Calder 1917, p. 91)
The tree in Modern Irish
cuileann

Meaning

Holly keeps its glossy, spiny leaves through the winter, green when most trees are bare. The kenning of its letter is a single word, trian, "a third". Calder does not translate it: his note reads "another thing the meaning of that to-day", so "a third" is the plain sense of the word and our gloss, not his. The Auraicept explains it as a third of a wheel: "a third of a wheel is holly, that is, because holly is one of the three timbers of the chariot-wheel". That is a medieval scholar's explanation, not a finding of archaeology.

Our reading takes constancy from the tree: people born in this month are read as resolute and direct, ready to stand up for what they value and to stay true to themselves whatever the season. The reading is ours.

The letter

Tinne is the third letter of the second group: three strokes to the left of the stemline. Its Old Irish name tinne means a bar of metal; it is not a tree name. The Auraicept glosses it as holly, cuileann; the Ogam Tract offers holly or elderberry. O'Flaherty in 1685 said that no explanation of this letter was given.

The Holly King

Modern pages say the holly rules the waning half of the year in a contest with the oak. The Oak King and the Holly King are Graves' own reading, taken up by later Wicca; no Irish source has them. In Graves' trees of the week the holly goes with Mars and Tuesday.

In Graves' year

Holly runs from 8 July to 4 August, the same in every list of the tree months. The planet, gemstone, animal and personality title that tree-sign websites give it are modern, after Paterson (1992) and later lists, and are not used here.

Correspondences

Each item with how it stands: “sourced” is in the work cited, “our construction” is EsoTerrier’s own, and “disputed” means the sources disagree.

The Auraicept's explanation
"a third of a wheel is holly, that is, because holly is one of the three timbers of the chariot-wheel" (Calder 1917, p. 91) sourced
The Ogam Tract's gloss
holly or elderberry (cuileann no trom) (Calder 1917, p. 277) sourced
O'Flaherty's gloss (1685)
Tinne: "the explanation of this letter is not given" sourced
How the letter is tied to the tree
A medieval gloss: the name means something else sourced
Colour and bird words for the letter (a medieval curiosity)
Colour: temen, "dark grey"; bird: truith, "starling". Words that begin with the letter, like the tract's lists of churches; not the tree's colour or animal sourced
Our reading
Green when most trees are bare: resolute and direct, standing up for what it values whatever the season. our construction

How the schools read it

The medieval tracts
The kenning "a third"; the Auraicept glosses the letter holly (cuileann).
O'Flaherty, 1685
Tinne: "the explanation of this letter is not given".
Graves, 1948
The eighth month, 8 July to 4 August.
Ogham scholarship
tinne means a bar of metal; the tree is a learned gloss.
Tree-sign websites
The same dates; a planet, gemstone, animal and personality title, all modern. Not used here.
EsoTerrier
Green when most trees are bare: resolute and direct, standing up for what it values whatever the season.

Claims about it

  • The letter name Tinne means holly.

    false

    What the record shows: Tinne means a bar of metal. Holly is the medieval gloss, and the Ogam Tract offers holly or elderberry.

  • Holly was used for chariot wheels.

    unverified

    What the record shows: This is the Auraicept's explanation of the kenning, a medieval scholar's gloss, not an archaeological finding.

  • The holly rules the waning half of the year.

    unverified

    What the record shows: The contest of an Oak King and a Holly King is Graves' own reading, taken up by later Wicca. No Irish source has it.

  • The Holly month belongs to an old Celtic calendar that the Druids kept.

    false

    What the record shows: No ancient or medieval source has a tree calendar or a tree for each birthday. The thirteen months are Robert Graves', set out in 1948.

Elsewhere on EsoTerrier

Sources

Primary texts (4)
  1. George Calder (ed. and tr.), Auraicept na n-Éces: The Scholars' Primer, with In Lebor Ogaim (the Ogam Tract). Edinburgh: John Grant, 1917. Quoted with page. archive.org/details/auraicept00calduoft
  2. Roderick O'Flaherty, Ogygia. London, 1685; English by James Hely, Dublin, 1793. archive.org/details/ogygiaorachrono00helygoog
  3. Robert Graves, The White Goddess. London: Faber and Faber, 1948 (revised 1952 and 1961). Facts only; not quoted.
  4. The Unicode Standard, Ogham block U+1680 to U+169F (encoded in Unicode 3.0, 1999). unicode.org/charts/PDF/U1680.pdf
Studies and other sources (8)
  1. Damian McManus, "Irish letter-names and their kennings", Ériu 39 (1988), pp. 127 to 168. jstor.org/stable/30024135
  2. Deborah Hayden and David Stifter, "Ogam and Trees", OG(H)AM project, 20 December 2022. ogham.glasgow.ac.uk/index.php/2022/12/20/ogam-and-trees
  3. "Ogham", Wikipedia (orientation only). en.wikipedia.org/wiki/Ogham
  4. "The White Goddess", Wikipedia (orientation only). en.wikipedia.org/wiki/The_White_Goddess
  5. Mary Jones, "Celtic Tree Calendar", Jones's Celtic Encyclopedia (2004). maryjones.us/jce/celtictreecalendar.html
  6. Helena Paterson, The Celtic Lunar Zodiac. London: Rider, 1992 (known from catalogue records and Penczak). search.worldcat.org/oclc/31606966
  7. whats-your-sign.com, "Celtic Tree Astrology", Wayback Machine capture of 28 February 2008 (cited only as the source of the claim). web.archive.org/web/20080228140902/http://www.whats-your-sign.com/celtic-tree-astrology.html
  8. Foras na Gaeilge, focloir.ie and teanglann.ie (Modern Irish forms). focloir.ie
Our own research (2)
  1. EsoTerrier, Celtic Tree research and validation, 11 to 13 October 2026.
  2. EsoTerrier calculation engine, the Celtic Tree Calendar service, its texts and its documentation.

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