I'm so sorry about Nikki
I lost my girl Starr last October and I still miss her so much
My husband insisted on getting a new pup right away, if you search on my username you can find the whole story behind that. It really did help me so much, though I wanted to wait to get another dog, if ever. We now have two girls.
I have to agree with your family veto of the name, though, sorry to say
This girl deserves her own identity, she's not Nikki, but she'll certainly help heal your heart. Perhaps the name Hope might be appropriate? She sure is adorable, and your Nikki was absolutely beautiful.
RIP little girl