Silmariën could have been the next ruling Queen of Númenor but because of the law of agnatic primogeniture, she could not take the Sceptre. However, when Elatan and Silmariën had their first child, Valandil, Tar-Elendil created the title Lords of Andúnië to celebrate his first grandson. Valandil would become the first Lord of Andúnië and Elatan's descendants would be titled noblemen.
Elatan's descendants would figure prominently in the history of Middle-earth. After the Downfall of Númenor, Elendil, the last Lord of Andúnië, would found the Kingdoms of Arnor and Gondor. Over thousands of years, Elatan would become the ancestor of Aragorn II Elessar, the hero of the War of the Ring.
Elatan means "star-man" in Quenya. It came from the words el, meaning "star", and atan, meaning "man" (usually pertaining to mortal men).