A little niece at just 3 once told my dd very matter of factly about their house burning down, and about her daddy being very ANGRY! - she said a lot about that. Dd reassured her about the house, and since my BiL is exceedingly chilled she said she was sure her daddy would never be angry like that.
Again quite matter of fact, niece said, oh, not THAT daddy, I mean my OTHER daddy, before.
I've heard of this sort of thing in one other child, but these things seem to stop by about 5.
When my MiL died at only 68, for several days I had a very strong impression of her being there in our sitting room - we'd always got on we'll and she'd always been happy at our house. I could almost see her sitting on the sofa.
Of course I put it down entirely to my imagination, and when my father died only 6 months later, I fully expected to feel the same, either in my house or my mother's.
But there was nothing. Zilch.
And here's a doggy one!
Friends had a most beloved flatcoat retriever, Charlie, who was ill and on his very last legs. They lived in a converted barn, a semi, with an identical one next door.
Shortly before the dog died, the next door neighbour's son had popped in for a visit, and went upstairs to check his emails on their computer. (This was before the smartphone era).
His girlfriend went with him, and was startled when he suddenly said, 'Did you see the dog?'
She said no, the dog (a Dalmatian) was downstairs.
He said, not that dog - out of the corner of his eye he'd seen their old dog, a Weimaraner, who'd died some years previously.
He was very shaken and had to go to the village pub to fortify himself!
The old dog had been friends with the neighbour's' flatcoat, so they all liked to think he'd come to keep Charlie company on his way.