I may well have, at some time in the past, used ACDSEE Quick View to set up the images initially, but I am almost 100% sure I added the person-in-image info using XnViewMP.
Question: does XnViewMP leave any 'trace' of its involvement in editing any metadata in an image?
I can well image that it might not, but I am curious and would like to educate myself a bit more on this subject

TIA