Walking around the block with Eric and Mom, we were talking about my Grand Purge of 2020, wherein I am discarding, donating, or destroying many, many things that I have. I have been taking pictures of things before sending them on their ways.
Eric commented he'd been looking at pictures recently, of family members long since passed, people no one alive remembers anymore, and wondered if there isn't a fourth death.
"There are three deaths. The first is when the body ceases to function. The second is when the body is consigned to the grave. The third is that moment, sometime in the future, when your name is spoken for the last time." ― David M. Eagleman, Sum: Forty Tales from the Afterlives
The fourth death would be the last time someone looks at a picture of you.