I use “pantheon” here to refer to the group of gods that are common to a culture, but it isn’t an ideal term, and the way the gods relate to one another (and to mortals) within each group varies a great deal.

Greek/Hellenic Gods

Irish Celtic Gods[1]

Welsh Celtic Gods[1]

Gaulish and Brythonic Celtic Gods[2]

Continental Germanic Gods[3]

Norse (Scandinavian) Gods

Egyptian/Kemetic Gods

  1. [1]Most of the information on the gods of Ireland and Wales is from various myths, so details can vary depending on the source; particularly in the case of Wales, mythological characters are not always identified as deities, possibly due to the stories having been written down in the post-Christian era. I am taking the broad view here and using the words “goddess” and “god” to refer to these supernatural entities.
  2. [2]Most of the information on the Celtic gods of Britain and Gaul is archaeological or historical, a circumstance that provides its own challenges including the tendency of the Roman writers to equate all gods with their own. The Celtic gods did not comprise a pantheon in the sense that the Greek or Roman gods did–most of these deities were associated with specific tribes and/or regions, and would not have been worshipped together traditionally unless they both came from the same region, and possibly not then.
  3. [3]On the European continent, the Gaulish and Germanic tribes can sometimes be difficult to differentiate–there was a certain amount of contact, and in some cases it is uncertain whether a deity was honored in Gaul or Germania.