In the posthumously published The Silmarillion, elves are mentioned as the firstborn, the first children of Ilúvatar, the god of Tolkien's legendarium. The elves are sorted into two main kindreds: the Eldar and the Avari. The Eldar were divided into three groups: the Vanyar, the Noldor and the Teleri. In Tolkien's writings, the Noldor, the Sindar and the Silvan Elves, the last two being subdivisions of the Teleri, are the most prominent. The elves were summoned by the Valar to live with them in Valinor, long before the appearance of men and flourished in stature, craft and lore.