Board Thread:Lore/@comment-26535281-20150628202804/@comment-26073467-20150628204901

No, rivendell elves are noldor, but elrond is a half-elf, so he got to choose his immortality. His brother, elros,  chose to be a human, and became a numenorian king.

So technically,  arawen is Aragorn's second cousin 10^30 removed. :P