Naming Dilemma...

My husband and I have prepared a name for our first child since before I was even pregnant. If its a girl, we shall call her G....r and if it is a boy, we decided on H.......n. We both have a strong reason on why we chose these names, they have a particular sentimental value especially to my husband. The girl's name was selected in memories of my husband's late sister who (Allah bless her soul) passed away in 2007. OK, so you may be thinking, Mrs Bawazir's got it all figured out about the naming part...Wrong! Turns out, my mum wanted a different name for her first grandchild. We were sitting in the family room, just chilling out a few days ago. Suddenly, my mum goes "We will call the baby Fatima Az Azzahra." I was speechless for an entire minute, like, WHAT? I know my mum is excited and all but without even asking me first? So, I said "Umm, we've already decided on a name and its G....r." She was not too happy so she tried to add a middle name, by suggesting a very old fashion name, Uggh. I love you mum but when it comes to names, I hate, No, I loath middle names. I just don't see the reason for it besides the fact of taking 5 seconds of my child's future time when filling a form. I gently told her that my husband and I feel very strongly about this particular name that we chose. The awkward discussion went on for another 5 minutes when finally she gave in with a little look of reproach. Forgive me mum, but you had your chance of naming 8 children, Mashallah. This is my time. Ladies, was I too hard on my mum or did I do the right thing by sticking to what my husband and I have been planning since ages???