My mom hates my babies name!! She associated the name with every bad thing possible!! What do you think?

This is baby number three for us. My mom, with my daughter , said she didnt like the name, Lillian. And I still think of that to this day, and Lily is 9 years old. With my second we named him after his daddy, so he is Ryan Jr. , so she had nothing negative to say about that name. Seven years later with the unplanned conception of my third child, and knowing she would hate the name, I didnt tell her until recently. I was vulerable, for the fact I confided in her that discoveries on my recent sonogram, the baby has a two vessal cord. He looks very healthy, but we are still conserned and doctor says NO EXTRA STRESS!! Then she asked if we had any names picked out, having a heart to heart and feeling free of judgement, I blurted it out...Preston Liam Wilsey!! She was not shy to tell me how much she hated the name, labeling Prestons to be some of the worst people( I will not even dare repeat what she said) and continued on to say, youd better run that by your father. Well, I felt horrible..and the doctor saying I need to be stress free, I am MAJORLY stressed, AND SOOO BOTHERED! When I told my husband his jaw hit the floor!! He said he had more faith my mother then that. That name really "fit" and our family has grown to love that name...our children even talk talk to him by that name. Granted Im only 22 weeks pregnant...Preston was it!!My husbands family is in LOVE with that name too. Last night in the middle of the night, I woke up and confided in my husband that his name can not be Preston. He is very upset as well, especially now. With my complications in my pregnancy, I dont have the will to call her and ask her why she never gave the name a chanceor confront her in any way, and she has not called me back either(this is not new for her, we are not that close but I still want to be and value her) Preston is old english meaning dweller of church or priests town and Liam means strong willed warrior. And those meanings give me encouragement!!Especially now!! PLEASE ANY ADVICE!! Thanks in advanced and GOD BLESS you all!!