Yes, it could be. :-D
I probably see the Catholic part because I'm Catholic.
My daughter's name is Miriam. My husband was once at a playground and another father (Muslim) asked why we gave our daughter a Muslim name. My husband explained that it was from the biblical story of Moses. The man then asked if we're Jewish.
My nephew is Isaac, his last name is a very unusual Germanic name that sounds Jewish. He's often thought to be Jewish.