[Urwen]

Okay, so I found this:

'It is true all the same,' replied Gandalf. 'About their origins, at any rate, I know more than hobbits do themselves. And even Bilbo's story suggests the kinship. There was a great deal in the background of their minds and memories that was very similar. They understood one another remarkably well, very much better than a hobbit would understand, say, a Dwarf, or an Orc, or even an Elf. Think of the riddles they both knew, for one thing.'

I might be grasping at straws, though, but I won't stop trying.