Your confirmation name is the name you choose to be confirmed under. You choose the name, either a saints’ name or a virtue (eg. charity, chasity, prudence, etc.). Some people will choose two names, like - Daniel Theresa, for example. There is no strick rul for picking a name, some pick a saint that they admire and choise to model their life after (I choose Joseph, because I admires his humility) **others take the name of a loved one or friend that they admire, and some just pick a name that they like. **Many dioceases encourage candidates to use the name their given name, insteed of picking a new name. I have been preparing youth for confirmation for some years now and encourage they to choose a saint or virtue that has a special meaning for them, even if that is their given name.
I hope this helps you. Feel free to ask for any more info.