Disclaimer: All characters belong to
Tolkien. I own nothing but cat barf.
Just how inbred are Elrond's kids, anyway?
If we are to judge by the younger elves in LOTR, the Eldar were more or
less responsible for the extinction of their own species. Arwen chooses
mortality and marries a man, Legolas ends up with a dwarf, and as for Elladan
and Elrohir, their celibacy has inspired some rather twisted explanations among
fanfic writers.
Whatever the cause of the twins' long bachelorhood, the example set by their
ancestors would not encourage them to range far afield in their love interests.
Their mother's parents, Galadriel and Celeborn, are second cousins. Elrond's
grandmother, Nimloth, is Celebrian's cousin, and his other grandmother, Idril,
is Celebrian's second cousin. Celebrian's father is Elrond's great-great uncle.
Elrond's great-great grandfather, Galadhon, is cousin to his great grandmother,
Lúthien. Even the mortals are not innocent - great grandfather Beren is first
cousin twice removed to Elrond's grandfather, Tuor.
Then again, Elladan and Elrohir would not have many choices outside the family,
either. Papa is a bit of a snob, so we can rule out the wood elves. Thranduil's
clan? Well, if Celeborn's cryptic comment upon meeting Legolas in LOTR is
to be understood the way many fans read it, Legolas and any brothers or sisters
are close relatives of both Celebrian and Elrond. Círdan's relatives? Círdan
is probably the son or grandson of Celebrian's great grandfather, Olwë (ref: The
Peoples of Middle-Earth).
Indeed, Tolkien's penchant for linking royal blood lines would leave the
hereditary rulers of elves with few suitable choices among their own species. If
the wood elves followed the example set by the Eldar, one may assume that they,
too, became hopelessly inbred. Over time, their better elven sensibilities would
disappear, and the hapless remnants of once proud elves would be twisted by
fanfic writers in mockery of all that is good and canonical. In short, they
would become, in modern times, that loathsome species known as Mary Sues, bane
of spell-checkers and grammatically intact fanfic. Alas, we have only Elrond and
his over-bred progeny to blame for their humiliating decline and the ensuing
extinction of the elven species.