J.R.R. Tolkien> The Silmarillion

Fingon was the eldest son Fingolfin, and became High King of the Noldor after his father's death in the Dagor Bragollach. He was friends with Maedhros in Aman and later saved him from Thangorodrim where he was hanging by his hand. He was among the Elves in Aman that favored the pursuit of Melkor and the Silmarils, although he was no friend of Fëanor. In Middle-Earth, he defeated Glaurung in the Wars of Beleriand (Year 260 of the First Age), although the dragon was not slain.

Fingon was killed by Gothmog, the Lord of Balrogs during the Nirnaeth Arnoediad (Battle of Unnumbered Tears) in the year 473 of the First Age. He was the father of Gil-Galad, the last High King of the Noldor.

                               Fingolfin
                                   |
                        ___________|___________
                        |          |          |
                      Fingon     Turgon     Aredhel
                        |
                     Ereinion
                    (Gil-galad)