I don't understand why you want to go to the trouble to do this. Is most of this media attached to a Source Citation? If so, the media is already organized to be available from each person's Person Tab. You can see how many media items are attached to each fact (usually through citations) - by the number in the middle column of numbers - headed by a reddish-brownish book. You can see each media item attached to a citation by the same reddish-brownish media icon for each citation.
In FTM, the actual titles of media can be a series of random numbers, but still be easily found by just finding the person, and/or citation - at either the Person Tab or the Source Workspace.
Why go to the trouble to do all of this name changing? It makes no sense to me. I'd rather be spending my time researching.
Also, if a person were to use some kind of scheme to title media - I wouldn't put people's names in it. A given census page could have 20 people from four families. A given page from a book of Soldiers with a common surname may have 30 names on a page. etc, etc.