Jacob Bryant (1715 – 1804) was a British scholar and mythographer, who has been described as "the outstanding figure among the mythagogoues who flourished in the late eighteenth and early nineteenth centuries".
The gist of it, is that Bryant believed himself to be able to use etymology to derive all ancient myth to sun-worship, through a mythical tribe who became the Chaldeans.
Some interesting notes, such as poseidon's rites being fire-related, but in general not recommended, though obviously a good mine for further works on the subjects.