[valarauko]

> In those lands I journeyed once, and many things wild and strange I knew. But I had forgotten Bombadil, if indeed this is still the same that walked the woods and hills long ago, and even then was older than the old. That was not then his name.

My takeaway from this was that Elrond wasn't sure if this was the same person - strongly speculated to be, and probably correct, but not someone Elrond had personally known or corresponded with. It felt like this was the first time he'd heard the name Tom Bombadil, and made an educated guess that it was probably old Ben-adar. Tom, meanwhile, had contact with Gildor at the very least.