I was going to write an essay on Celtic Religion and then another one on Celtic Reconstructionism but then realized that I had so many resources from people who actually knew and researched more than I ever could. Instead I decided that the best way to do this was to list these resources and as I come across more and more of them I’ll add it here.
Celtic Religion: What do we really know about it? – This article originally appeared as a multi-part message on CELTIC-L@Danann.hea.ie. **Highly Recommended
celtic_religion This is a report on the subject with good information.
Celtic Polytheism: This is an article on Wikipedia. As with everything on there please check up on the sources and be sure to cross reference.
Celtic Reconstructionism (CR): This is an article on Wikipedia. As with everything on there please check up on the sources and be sure to cross reference.
The Celtic Reconstructionism Frequently Asked Questions list: This list is also available in print now with 37 pages of additional material, including a glossary and pronunciation guide which provides readers with an introduction to the Celtic languages, as well as pronunciations for many Celtic terms and Deity names (in Irish, Gaelic, Old Irish, Welsh, Scots and Gaulish). It is indexed and thoroughly cross-referenced, making it very user-friendly for beginners as well as those with many years in the tradition.** Highly Recommended
Proto-Indo-European Religion: The Proto-Indo-European Religion is reconstructed on the basis of linguistic analysis of the languages used by Indo-European-speaking people. This website gives scholarly information on what is known about this religion, and the status of research in the field. Particular emphasis is placed on the oldest sources in each language group, but folklore, traditions and even Christianized versions of Proto-Indo-European goddesses, myths and rituals have been used as well. In India, the religion continues as it has for millenia, so information from recent or modern sources is relevant to the study.** Highly Recommended
Ceisiwr Serith’s Proto-Indo-European Religion: One of the best people to write on the subject.** Highly Recommended
There are many books on the subject:
Caesar, Julius, The Gallic War, tr. by H. J. Edwards (Cambridge MA: Harvard University Press, 1994)
Chadwick, Nora, The Celts (NY: Penguin, 1991)
*Cunliffe, Barry W., The Ancient Celts (Oxford: Oxford University Press, 1997)
Cunliffe, Barry W., The Celtic World (NY: St. Martin’s Press, 1993)
*Danaher, Kevin, The Year in Ireland (Irish Books & Media, 1994)
Ellis, Peter Berresford, The Celtic Empire (London: Constable, 1990)
Ellis, Peter Berresford, The Druids (Grand Rapids MI: Eerdmans, 1995)
Koch, John and John Carey, The Celtic Heroic Age: Literary Sources for Ancient Celtic Europe and Early Ireland and Wales (Malden MA: Celtic Studies Publications, 1995)
Keep an eye on this post as I might update it with even more stuff as I come across them.