dedup_restore_names.sh

#!/bin/bash

topdir=$(realpath "$1")
orig_path_dir="$topdir-orig_path"
tmp_dedup_dir="$topdir-tmp_dedup"

find "$tmp_dedup_dir" -type f | while read -r unnamed_file ;
do
    namefile="$(basename "$unnamed_file")"
    namefile_path="$orig_path_dir/$namefile"

    mv -v "$unnamed_file" "$topdir/$(cat $namefile_path)"
done

rm -r "$orig_path_dir" "$tmp_dedup_dir"