Microsoft removed the find duplicates feature, gives you good hobby project to work upon!
I have made a local copy of all my family pictures. First I use tool to find duplicates based on image exif data, next try to adjust their "date taken" and sort them by YYYY-MM folders, this you can do seperately for each member or merge them together... Foe each case there are some free to use tools, I suck at command line work so went with GUI based ones... All these were on windows so now need similar for mac, doubt they will be easily available for free, else will do pending work on NUC. Let me know, if want the tool names...