I dont name my file with information regarding the content of the file. Since I have a library & computer background I believe in using the computer to make things easier. Which includes silverfoxes comment above.
I tend to use my library training to name files based on accession data or catalog numbers based on my off site paper data/information retention database.
So potential files names would be N25871_2013096_01.jpg where the first part is the catalog identifier, the second part is the accession date (96th day of 2013), first item. Libraries and museums use naming standards like this because in many cases the actual contents of the item may start out unknown or have multiple people or connections within the one document/media.
In MS-Windows you can add tags to .jpg files to identify the content of the picture. You can also add comments and copyright information.