I was told in my RCIA class that we could. I was also told you can choose a name such Joseph Mary. The name can also be switch to a feminine or male form of the saint’s name. The main idea is to find a saint that you can identify with before they were considered saints so that the saint can be an example for you to follow. Hope this helps!
My son’s middle name from Baptism is Edward-Jude. When he was confirmed a few years ago, he chose St. John Bosco as his patron. So he now is Gregory Edward-Jude John Bosco (Surname).
DISCLAIMER: Catholic Answers has turned over the archive to Catholic-Questions.org and no longer owns, manages, or moderates the forums. For additional apologetics resources please visit www.catholic.com.