My family (mom, dad and sister) Hates the name I've chosen for my Daughter!

Keiyana
We've chosen the name 
Dalliss Danielle 
(yes pronounced like Dallas but with a liss at the end Dal-liss) and my family is refusing to call her by her name. I'm 24 weeks so of course there is still time for them to adjust but, I think it's a slap in the face for them to deliberately tell me they hate it and the refuse to call her by her name. We are not changing our minds on her name. How should I deal with my family being rude and disrespectful?  My feelings are truly hurt.