The "Book of Lost Tales 2" contains a description of the 11 Houses of the Gondolindrim, known in canon only through Glorfindel of Gondolin of the House of the Golden Flower and Galdor of the Tree.

The House of the Heavenly Arch was a large folk of uncounted wealth, which was reflected in their dress and weaponry. They were arrayed in a glory of colours, and their arms were set with jewels that flamed in the sun. Their shields were coloured as the blue of heaven, with the bosses a jewel built of seven gems – rubies, amethysts, sapphires, emeralds, chrysophase, topaz and amber. Opals of huge size were set in their helms. Their chief was Eglamoth, and he wore a blue mantle on which stars were embroidered in crystal. He was the only one of the Noldor to bear a bent sword, but he preferred the bow, and his House were known as archers.
Encyclopedia entry originally written by atalante_star