| Ogham letters ᚛ᚑᚌᚐᚋᚁᚂᚃᚓᚇᚐᚅ᚜ | |||||
| Aicme Beithe ᚛ᚐᚔᚉᚋᚓᚁᚂᚃᚄᚅ᚜ |
Aicme Muine ᚛ᚐᚔᚉᚋᚓᚋᚌᚎᚏ᚜ | ||||
| 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 | |||
Luis (ᚂ) is the second letter (Irish "letter": sing.fid, pl.feda) of the Ogham alphabet, derived either from luise "flame" or from lus "herb". Its Proto-Indo-European root was either *leuk- 'to shine' or *leudh- 'to grow'. Its phonetic value is [l]. If the letter name follows the same pattern as ruise to ruis, it is likely that the letter was originally named from luise, though different kennings point to both meanings.[1]
- ^ McManus, Damian (1991). A Guide to Ogam. Maynooth Monographs. Vol. 4. Co. Kildare, Ireland: An Sagart. p. 36. ISBN 1-870684-75-3. ISSN 0790-8806.
The kennings point to an association of this letter name with either luise/loise 'flame, blaze' or lus 'plant, herb'. The word itself is not reliably attested in a context which would indicate its precise primary meaning but it is clearly related either to the root *leuk- 'to shine' or *leudh- 'to grow', either confirming /l/ as the value.