What is ogham?

Ogham

Ogham (/ˈoʊ.əm/ or /ˈɒɡəm/; Old Irish: ogam, Modern Irish or ) is an Early Medieval alphabet used primarily to write the Old Irish language, and the Brythonic languages. Ogham is sometimes called the "Celtic Tree Alphabet", based on a high medieval Bríatharogam tradition ascribing names of trees to the individual letters. There are roughly 400 surviving ogham inscriptions on stone monuments throughout Ireland and western Britain; the bulk of them are in the south of Ireland, in Counties Kerry, Cork and Waterford. The largest number outside of Ireland is in Pembrokeshire in Wales. The remainder are mostly in south-eastern Ireland, Scotland, Orkney Isles, the Isle of Man, and England around the Devon/Cornwall border. The vast majority of the inscriptions consist of personal names.

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Some articles on ogham:

Ogham - Neopaganism
... Modern New Age and Neopagan approaches to ogham largely derive from the theories of Robert Graves in his book The White Goddess ... Graves proposed that the ogham alphabet encoded a set of beliefs originating in the Middle-east in Stone Age times, concerning the ceremonies surrounding the ... Graves therefore looked at the Tree Alphabet tradition surrounding ogham and explored the tree folklore of each of the letter names, proposing that the order of the letters ...
Scholastic Ogham - Manuscript Traditions On Pragmatic Use of Ogham - Magical
... The issue of ogham being used for magical purposes is the subject of a tedious argument among scholars over whether it was the alphabet itself that ... is that there are clear examples in the literature of ogham being used for magical purposes ... indicate that magic was ever the main reason for inventing ogham ...
Wales In The Roman Era - Irish Settlement
... they settled that the inscription stones found in Wales, whether in Latin or ogham or both, are characteristically Irish that when both Latin and ogham are present on a stone, the ...
Scholastic Ogham
... Use of the early medieval Irish ogham alphabet is largely divided between "monumental" epigraphy and "scholastic" use in, or influenced by, manuscript tradition, Scholastic ogham notably involves ... Scholastic ogham develops from about the 7th century and remains in use for notes in manuscripts until the 16th century ... Manuscript tradition of ogham notably records Bríatharogam, i.e ...
Scholastic Ogham - Literature
... Here the evidence is much more ambiguous as the use of the word ogham was sometimes used in later stories to refer to writing in the general sense, rather than in the ogham ... Instead he wrote his adventures in quatrains in ogham for the crowd gathered at the shore and departed, never to be heard of again ... Another instance of writing on wood which might possibly refer to ogham is found in the story of the lovers Aillinn and Baile Mac Buain ...