It has been proven by Tolkien himself
that Eru did permit the souls of slain Elves to be reembodied once
their
hurts have been healed in the Halls of Mandos. It has also been
said that some, such as Feanor, would be given a sort of punishment, to
remain
in the Halls of Mandos.
While we know that Feanor is kept in the Halls of
Mandos,
what of the rest of the House of Finwe? One of the most depressing
elements
of the First Age is the fact that all of the House of Finwe, save
Galadriel,
and Finarfin, were slain. The possibility of their reembodiment
is
uplifting, seeing as it's a wonderful thought that perhaps this doomed
family
is together again in Valinor.
The only members of the House whose actions could
have
brought about the same fate as Feanor are Maedhros and Maglor, who
stole
the two silmarils from Eonwe and his host. We know Maedhros died,
though
all we learn of Maglor is that he roamed the beaches singing of the
sorrows
of the Elves.
All other members of the house of Finwe were valiant
Elves,
(not to say that Maedhros and Maglor weren't!) and despite their doom
in the First Age, were deserving of the
happiness
that Valinor would bring.
One theory regarding the fate of Feanor said
that when Miriel died, she eventually joined Vaire the Weaver.
Perhaps
Eru or the Valar, after time, allowed Feanor to join the mother who
loved
him so much? And perhaps Feanor finally learned to control his fiery
spirit.