I had a great uncle who died the day I was born and shared my first name

Probably a few hours.

We named one of my kids after my deceased brother (who died many years before my son was born). They have a lot of the same personality traits and they also look a lot alike.

I don't think it's reincarnation or anything, but their many similarities are kind of uncanny sometimes. And it makes the fact that one was named after the other even more poignant.