No, no, no. You hit upon the point that there is [extended] family there. The theme is more broad than any of the individuals, Elrond included. Not more narrow.
For #4, remember this. Huey identified the correct Easterlings. The straight clue is NOT "her". Take each word separately in the clue and think if they actually refer to what you think they do. Extra hint: this one is not one of Elrond's closer relations.
Actually, to be more cryptically accurate, the clue should include one more thing. Re-worked, it reads:
Take her, and a double vowel switch first, and kill him with eastern invaders