Gil-galad [SEP] father
that his High Kingship of the Noldor is explained, as all of them had previously held the title, and it also perhaps explains his original name Ereinion (which means "Scion of Kings").
Other sources and versions of the text however, indicate that Gil-galad was the son of Orodreth of the House of Finarfin, and his name became Finellach Gil-galad. This would make him grandson of Angrod, the brother of Finrod Felagund, Aegnor and Galadriel.
His name in Tolkien's invented languages
Gil-galad
Ereinion Gil-galad () is a fictional character in J. R. R. Tolkien's Middle-earth legendarium. He is mentioned in "The Lord of the Rings" and "The Silmarillion". 
Character overview.
Ereinion Gil-galad was the last High King of the Noldor in Middle-earth.
In early texts, Gil-galad was the son of Fingon the Valiant, son of Fingolfin, son of Finwë, first High King of the Noldor. It is through this descent