Who Knew About Frodo’s Ring?

[Valandil]

Interesting.

And by the time Frodo leaves Bag End, the other "conspirators" all know: Pippin, Sam & Fatty Bolger.

One thing makes me wonder... if Gandalf had told Elrond and they eventually told Galadriel - it almost seems like eventually, over the 70+ years, that at least one of them would be insistent that Gandalf look into it and verify just which Ring it was. Especially once Sauron had revealed himself.

On the other hand - Gandalf had never told Saruman. Perhaps he never told Elrond or Galadriel either, but just decided to keep it to himself and keep watch.

The Dwarves of Erebor could have been the "weak link"... with the whole company knowing SOMEthing, the story likely spread somewhat among the community. At least among their immediate families (at least half were connected with the royal family though, as I recall). With someone coming to make an offer like Sauron's emissary did (I favor the Mouth of Sauron), did any younger Dwarf, who happened to know something, feel tempted to give what information he knew in exchange for a Dwarven Ring?

But apparently, either Dain had good enough control of the situation, or nobody was so bold and foolish, or the company of Dwarves just didn't share that secret around.