--- In
cybalist@yahoogroups.com, Piotr Gasiorowski
<piotr.gasiorowski@...> wrote:
> An older etymology derives <(h)a:(i)de:s> from *n.-wid-ah2-
'invisible'.
My 1857 Keightley's "Classical Mythology" has that, with the
footnote "From 'a' and 'eido', to see. The names of the Gods,
however, are rarely compounds."