Is it okay to be disappointed?

I have had 2 names picked out for when I have kids ever since I was in Jr. High. I have always wanted the names "Dax" and "Brayson". Well, last year my aunt got pregnant with twins. She had a boy and a girl and she sadly miscarried them. She named the boy "Daxton" and the girl "Grayson". I can now never name my kids the names I wanted because it would hurt her and I don't want to do that to her. But is it okay to be sad and disappointed and a little upset? I can also never name my little girl if I have one "Akayshia" because my other aunt named her girl "Kaysia". I'm just really sad about it. :/ but I feel bad for feeling bad about it.