Nallorath

Prince Nallorath (also called Nall by his friends) was a high elf prince 2,600 years before the First War when the demons started attacking Dalaran. He was the best friend of the half-elf Alodi. Nallorath was also a mage of the Kirin Tor.

Council of Tirisfal members Ethylar and Rohar were magi at his father's court, while Aertin Brighthand used to be. He did not know of the Council, nor of Ethylar's, Rohar's, and Aertin's connection to it.

Sunstrider?
While never explicitly called Sunstrider, Nallorath is referred to as a "royal" and may be a part of the Sunstrider dynasty. The established timeline suggests Nallorath held the title of prince during the time Anasterian was reigning as king (Anasterian ruled Quel'Thalas for at least 2,800 years, and Nallorath held the title of prince 2,600 years before the First War), and refers to his "father's court" at one point, implying he was the king's son rather than brother. However, Kael'thas is explicitly referred to as Anasterian's only son, so what relation Nallorath had to the king is unknown.

Considering his lack of reference, it is likely he had perished by the time Kael'thas was confirmed to be the last of the royal bloodline after the Third War. Had Nallorath survived to see the First War, he would have been almost of an age with the elderly Anasterian.