OOP: You won't find Solonor Thelandira in any of Wizards' published materials that I know if. The elven god comes from the FR accessory "Demihuman Deities" p. 132. His portfolio in the elven pantheon is archery, wilderness survival, and hunting.

Considering that Solonor Thelandira is a choice of gods in the PZ (again, check Anavren's character sheet, if you can), I think we'd all be safe in assuming that his worship by our characters is acceptable to the Admins. of CORE. Also, we'd probably be pretty safe in assuming that not only is all the Seldarine present on Oerth, but so is the entire pantheon of the dwarves, halflings, gnomes, orcs, etc. unless there is some minutae that might prevent the worship of one of those gods or another.
Anavren is a tall high elf with typical black hair & green eyes. He stands 5' 5" tall & weighs about 135 lbs. Anavren is dressed in forest colors and leather armor. He is never without his composite shortbow and a sheaf of arrows!