I have not even heard of some of these, even going back to the 2e supplements Faiths and Avatars and such. I see most are elf and halfling gods though.
I would find a map with areas of worship handy if you are putting together a supplement. This way my players would less 'shop' for a god and pick one from their background and nation. In 2e some of my players would pick a god depending on the powers it gave the PC, more powergamer and less themed. Not a big deal but it became hard to describe how a worshipper from the other side of the world was in Phandelvar.
Only 1 Halfling God did not appear in Deities and Demigods, Charmalaine, who was introduced into Greyhawk at some point. This is her first intro to the realms.
Most of the new to the Realms Gods are Elf and Dwarf, with sprinkling of Gnomish and Dark Seldarine Gods.