Valandil, Lord of
Valandil was the first Lord
of Andunie, in the west of Numenor.
He was the son of Silmarien, who
was the daughter of Tar-Elendil,
Numenor, therefore in the direct line from Elros, the first king.
From Valandil directly descended Amandil, who was the last Lord of
Andunie, and Elendil the Tall, who was the first High King of Arnor and Gondor.
One of Valandil's descendents, the third High King of Arnor and Gondor, was probably named after him: Valandil, youngest son of High King Isildur.
Reference: Return of the King