Yes, try czkawka- weird Polish name but pretty good app.
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Excellent, thank you!
Is dupeGuru what you're looking for?
dupeGuru is a tool to find duplicate files on your computer. It can scan either filenames or contents. The filename scan features a fuzzy matching algorithm that can find duplicate filenames even when they are not exactly the same. dupeGuru runs on Mac OS X and Linux.
dupeGuru is good with pictures. It has a special Picture mode that can scan pictures fuzzily, allowing you to find pictures that are similar, but not exactly the same
That does look to be the ticket. I'll give it a shot on a copy of the library and see what it can do. Thank you!
I never knew I wanted this. Thanks!
fdupes