That's exactly how it is. A prophecy can come with a name tag but that doesn't mean that everyone bearing that name will fulfil the prophecy.
Jabez changed his fate by prayer, King Hezekiah changed his fate by prayer also. Only in a few cases are things left the way they are. A good example of this is our Lord Jesus. It was written that he would save humanity by dying a painful death. No amount of prayer could have changed that because it as needful.
Thank you for reading sis.