Family member used name i wanted

My boyfriends cousins wife just had a daughter and named her Ruby that was what we are goinf to call our future daugher we had told them about that name months ago in a conversation as they asked what we would xall our children and now they had used it despite we were going to now im so up set coz I cant call my daughter it now as everyone will be thinking we copied of them has that happened to anyone before did you still called your child the name or did you change it