Ornendil
From Tolkien Gateway
Ornendil was the elder son of King Eldacar of Gondor. In the siege of Osgiliath during the Gondorian civil war, Omendil's father was driven out by Castamir the Usurper. However, Ornendil did not escape with his father and was put to death by Castamir upon the fall of Osgiliath.
Ornendil means "Friend of the Trees" in Quenya (from ornë = "tree" and -ndil = "friend, devoted to").