Beorn

[Pitchwife]

Well, if you go for the mythological feeling, that would mean Radagast-bear + mortal woman. The poor girl!

[The Might]

This discussion is taking a turn for the funny!

Indeed, in mythology it often happens that men charm the ladies as a beautiful -insert animal here- and then procreate.
In one really extreme myth this happened:

After he ascended the throne of Crete, Minos struggled with his brothers for the right to rule. Minos prayed to Poseidon to send him a snow-white bull, as a sign of approval. He was to sacrifice the bull in honor of Poseidon but decided to keep it instead because of its beauty. To punish Minos, Poseidon caused Pasiphaë, Minos' wife, to fall madly in love with the bull from the sea, the Cretan Bull. She had Daedalus, the famous architect, make a wooden cow for her. Pasiphaë climbed into the decoy in order to copulate with the white bull. The offspring of their coupling was a monster called the Minotaur. ~ From Wikipedia

Ok, so this is really extreme. I don't think Tolkien ever picture some woman building herself a wooden bear for any recreational purposes, and I doubt that any bestiality was involoved in his thoughts.

And I still doubt that Radagast was the type to fall in love with women... he was after all so in love with beasts, remember?!