hamsterwoman & I came up with this on livejournal ages ago.
Arthur: Feanor
Molly: Nerdanel
Bill: Curufin
Charlie: Celegorm, because of working w/ animals.
Percy: Caranthir, cause he’s the odd one out of the Feanorians & Percy’s the odd one out of the Weasleys.
Fred & George: Amrod & Amras. Redheaded twins.
Ron: Maedhros, because he’s the strategist of the Feanorians & Ron is a good strategist w/ his chess skills.
Ginny: Maglor
We weren’t entirely sure where to put Maglor & Curufin, so we ended up w/ them as Bill & Ginny.