I tend to believe that the celebrated unions, were noted because of the fact
that they accorded between mostly noldor - and of the royale houses.
I wouldn't doubt that there are in fact several other lesser unions. Marriages
among the sindar, avari. Maybe even cases of rape, and thus forth. It is a very
large world, and many ages have
passed.
"The snowflakes twirled around Krom like ballerinas on a worldly stage. Gracefully they swept across his baldhead, flirting with the ground, as if to foreshadow the coming of a greater snow." Venashara, chapter 2 book 1
