Pick the names you want. Long term, the way to improve fluency is by saying what you want to say on a day to day basis. Besides, their will be plenty of time to practice your children’s names. A good way is to go out in the streets and ask strangers, “Do you know how I can get to Lenora bar?” Or “how I can get to Genevieve Hotel?” They won’t be able to answer because these are probably not real places, but thank them and move on to the next person. Eventually the names will start to loosen and the emotional baggage around the sound of the name or the name itself will lessen.