Instead of "Abbott, John B.jpg I would have "John B. Abbott.jpg"
I'll just add some random advice that "John B. Abbott.jpg" is maybe not the best file name, just for cosmetic reasons.
1. A few edge cases get grumpy at dots anywhere else in the filename except the extension
2. Even though you don't use Excel, a trick I found is that "John-B Abbott" and "Billy Crystal-4th" are exactly two terms, so that programs (including Excel) can count the number of terms in a string, and then so things so for example the next term after that is maybe date taken, and you don't have an "Abott" date just because not all names have middle initials etc.