My coworker is mad at me because she was rude?

Eleanor

Today at work my coworker asked what my baby’s name will be and I proudly told her Arthur Benjamin. She told me that the was ugly and asked why I would do that to my child and then listed a bunch of names that she preferred over my choice. I told her that I wanted a more traditional name and uncommon to fit my family dynamic seeing as my name isn’t very common and neither is my bf’s. She even asked me if it was really set in stone and if my bf approved of this name because “he gets the final say anyway” and I told her that he actually picked the name and I agreed to it. She made a face and said “oh okay. Guess it’s sticking then.” I mentioned that that was very rude to say and she can have an opinion but it’s taboo to tell and expecting mother that her name choice is ugly and to list “better” choices. And now she’s mad at me?? Is there seriously something wrong with what I said? Because I really don’t understand.