From Tolkien Gateway

The River-woman was a mysterious person — apparently some kind of water-spirit — associated with the Withywindle in the Old Forest. She was the mother of Goldberry, who was for this reason known as the "River-daughter".

In a poem, Tom Bombadil was pulled into the river by the swimming Goldberry. She swam "back to her mother's house in the deepest hollow". Later, Tom returned to the river and asked the River-woman for Goldberry's hand; she complied unquestionably, so the two were married.[1]


Tom Bombadil


Legendary Races of Arda
 Animals:  Dumbledors · Gorcrows · Hummerhorns · Pards · Swans of Gorbelgod · Turtle-fish
Dragon-kind:  Sea-serpents · Spark-dragons · Were-worms
Evil Races:  Ettens · Giants · Half-trolls · Hobgoblins · Ogres · Snow-trolls · Two-headed Trolls
Other:  Badger-folk · Great beasts · Lintips · Mewlips · Nameless Things · Spectres
Individuals:  The Hunter · Lonely Troll · Man in the Moon · The Rider · River-woman · Tarlang · Tim · White cow