In earlier versions of the legendarium, until the era of the first edition of The Lord of the Rings, the name Finrod was given to the character later known as Finarfin. Finrod Felagund was at the time known as Inglor Felagund.
The name however was survived in the patronym Inglorion. The character with the name Inglorion in The Fellowship of the Ring Gildor Inglorion, although a fellow Noldo, was unrelated to Finrod and certainly not his son. Finrod, as seen in The Silmarillion, was unmarried and childless because his lover, Amarië of the Vanyar, did not follow him to Middle-earth.
At one point, Tolkien interpreted Inglor as a hypothetical Sindarin name of Felagund's father Finarfin, a translation of his Quenya mother-name Ingalaurë ("Top Gold"), but "this was not actually applied to Finarfin who never came to Beleriand".
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "III. The Quenta: Appendix 1: Fragments of a translation of The Quenta Noldorinwa into Old English, made by Ælfwine or Eriol; together with Old English equivalents of Elvish names", p. 213
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Quenta Silmarillion: Of the Noldor in Beleriand"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", pp. 361, 368, entries "ID-", "LAW"
- J.R.R. Tolkien, "Words, Phrases and Passages in Various Tongues in The Lord of the Rings: Eldarin Roots and Stems", in Parma Eldalamberon XVII (edited by Christopher Gilson), p. 118