idk, I think people think that she's gonna name their kids after all these dead people like Harry Potter did, but Katniss never struck me as that type of person. Perhaps middle names, but she always seems to try to completely block bad memories out, and I don't think she would be able to manage well if all the children were running around with the names of people whose violent deaths she all witnessed. So for the boy, I like the name Harbor, and for the girl, Sorrel.
True. I was also shocked that people, mostly, named Peeta and Katniss' kids after the ones who died through the series. I, being my funny self, named the boy Toast, but never got to find the right name for the girl. I also noticed that people, again mostly, thought Katniss named them and I was thinking, " Doesn't Peeta have a say in this, he is the father !''. I did little research and found that Collins named them Willow, the girl ( And I think that is a perfect name ), and the boy Rye ( Bread does go through the book and I said, "Go Figure" ). Sorry for the long comment just wanted to answer your question.