I received an email from D saying he would be in the area. I responded with my availability, mentioning that A would be visiting me during his time here.
He writes back: Sorry for forgetting, but who is A?
I reply: She is my brother’s daughter, making her M’s first cousin, maybe you remember that she was the flower girl at M’s wedding?
Later I realize, that since D and I (myself) are M’s parents that makes D, A’s uncle. But given our long separation and divergent pathways, I’m not really surprised that he didn’t remember, or even that I hadn’t made the connection.