Goldberry
From Tolkien Gateway
Goldberry, also known as the "River-woman's daughter", was the wife of Tom Bombadil.
Although her origins are uncertain, it has been speculated that she is a river-spirit of the river Withywindle. Otherwise, she and Bombadil are enigmas in Tolkien's Middle-earth legendarium. Her name may be a Westron derivative of the Sindarin Golodh-bereth, meaning "Flower Queen".
In Tolkien's The Adventures of Tom Bombadil the first poem tells the tale of her "capture" by Tom Bombadil.