Meaning: possibly 'high beech'
Location(s): Doriath, Greenwood
Title(s): King of the Silvan Elves in Greenwood the Great
Dates: ? - II 3441
"oro" - up, rise, high and "pher" (or pheren) - beech
The Lost Road, The Entymologies
"The Elvish folk of this realm had migrated from the south, being the kin and neighbours of the Elves of Lórien; but they had dwelt in Greenwood the Great east of Anduin. In the Second Age their king, Oropher [the father of Thranduil, father of Legolas], had withdrawn northward beyond the Gladden Fields. This he did to be free from the power and encroachments of the Dwarves of Moria...and also he resented the intrusions of Celeborn and Galadriel into Lórien."
"...Oropher had the wisdom to foresee that peace would not return unless Sauron was overcome. He therefore assembled a great army of his now numerous people, and joining with the lesser army of Malgalad of Lórien he led the host of the Silvan Elves to battle. The Silvan Elves were hardy and valiant, but ill-equipped with armour or weapons in comparison with the Eldar of the West; also they were independent, and not disposed to place themselves under the supreme command of Gil-galad. Their losses were thus more grievous than they need have been, even in that terrible war... Oropher was slain in the first assault upon Mordor, rushing forward at the head of his most doughty warriors before Gil-galad had given the signal to advance. Thranduil his son survived, but when the war ended and Sauron was slain (as it seemed) he led back hom barely a third of the army that had marched to war."
"Oropher had come among them with only a handful of Sindar, and they were soon merged with the Silvan Elves, adopting their language and taking names of Silvan form and style."
Unfinished Tales, History of Galadriel and Celeborn