Nolondil

Nolondil was the third son and youngest child of Vardamir Nólimon, first King of Númenor. His eldest brother became the third King of Númenor, Tar-Amandil. Nolondil had three children: one daughter, Yávien, and two sons, Oromendil and Axantur.

Etymology
"Nolondil" means "devoted to knowledge" in Quenya (from ñólë = "lore, knowledge", -ndil = "friend, lover, devoted to").