I have that (Prosopagnosia) to some extent, and it’s kind of the opposite. Everyone looks different and nobody reminds me of anyone. When people discuss family photos saying things like “don’t they look like their father”, I get nothing.

My son was in a big stage show when he was 12, and we all went to watch. I struggled working out which one he was until he spoke / sang.

Hold on, are you talking about the brother?