One must remember also that in the early "
Fall of Gondolin" there were thirteen
Elvish Houses in
Gondolin, one of them being the House of the King, one being the House of the Wing, which was
Tuor’s house.
Tuor was a man, so the member's of his house could not be his relatives.
From
Unfinished Tales, “Of Tuor and His Coming to Gondolin”:
And Voronwë cast back his hood, and his face shone in the ray, hard and clear, as if graven in stone; and Tuor marvelled to see its beauty. Then he spoke proudly, saying: ‘Know you not whom you see? I am Voronwë son of Aranwë
of the House of Fingolfin.
Neither Voronwë or Aranwë appear in any genealogy of the royal families of the
Elves, so this apparently only means that Voronwë or Aranwë was one of the followers of
Fingolfin.
This other meaning of “house” means that
Gildor’s father Inglor, in Tolkein’s revised genealogies, now becomes a member of the House of
Finrod in this other sense, not the son of Finrod as he would orginally have been.
We are presumably to imagine Gildor and his companions as mostly Elves who once dwelt in
Nargothrond, but not necessarily mostly closely related to Finrod.