I tried this AI program to fix a scratched-up, blurry photo of my old-country ancestors

Here's a video describing an AI program that restores blurry and damaged old portraits. The technique is presented in a paper titled "Towards Real-World Blind Face Restoration with Generative Facial Prior."

As Louis Bouchard says in his piece about the software, the results are just best guesses of what the person might look like:

They do not represent the actual image.