Kitiara Denus wrote:
> Finally, there is the theory that the real name of the sun, as it
> happens with other heavenly bodies, such as the moon, was taboo to
> use and that Grían (brilliance, radiance) is a word used to avoid
> saying the true name (but I still don´t know what kind of figure
> lies behind).
> I´ve read also that the name Sol (used by romans for their god
> “Sol invictus) can be found also in irish sources and that it might
> or might not be a latin borrowing (any extra information about this
> or any text where we can find the reference? I´m interested in this
> one since it is the same word we still use in spanish).
It appears that the Irish reflex of the IE word for "sun" underwent a
semantic shift early on. Here's what I said on the Focal an Lae site
History: Old Irish “súil” comes from Common Celtic *sūlis, which
derives from Indo-European *sāwel- (sun). The metaphorical leap from
“sun” to “eye” may seem extreme, but is not unprecedented.
“Súil” is thus cognate with various “sun” words, from Welsh
“haul” to Latin “sol”, which yields English cognates such as
“solar”. The Irish word for “sun” is the completely unrelated