Of course, the really amusing and interesting piece of genealogical history is that Galadriel is Elrond's mother-in-law, and therefore Arwen, Elladan and Elrohir's maternal grandmother. Small wonder, then, that she takes such an interest in Aragorn when he passes through her country.
I didn't really work this out, since it's right there in the text, but that sort of familial tie between these two commanding figures among the Wise does make me wonder what those White Council meetings were really like. Along with Gandalf's casual baiting of Saruman, I wonder if Elrond was ever told that Celebrían could have done better for herself or that he was a feckless wastrel.
Yes, this
is just an excuse to use the new smiley.