what's with Feanor's kids?

[burrahobbit]

1)why were all of his kids boys?

Amazing coincidence.

2)why did only one son have a kid?

There are several reasons. Mostly they were a bunch of uncool people. If I knew Feanor's kids I would not hang out with them at all. Aside from (or perhaps causing) that was their oath. They had to get the silmarils, no matter what. No time for chicks, man.

wisdom

Wisdom and Feanor have absolutely nothing in common.