There was a case of "reincarnation" in the US that was something like this.
The child reported an extreme knowledge of life in a small Scottish (possibly Irish I can't remember) village. No one could explain it, but it turns out that a nanny hired by the family when the child was under three told her stories about her home.
Edit:
I think this is the case http://en.wikipedia.org/wiki/Bridey_Murphy.
Well, I can tell you this. We never had a nanny, nor any other caregiver but us, save a few times with my parents, as Andrew's are too old and infirm to care for the bairns on their own.
The wee ones have never had a babysitter or been left with one.
But there was a one time, before Struan was born, that the 4 of us went to spend the night in a small village in the Perthshire Highlands, where first we thought to go, before we came through here.
On the way home, our eldest started to repeat, 'Get off this road at (I won't say that place's name). I want to see my sheep.' Now mind you this girl has had delays first noted at her 8-months check. She was never one for clear speech at that time. But this was clear as a bell.
We planned to stop in this place anyhow. Neither I nor my husband had set foot there in all our lives. Generations ago, MIL's folk, some man of her folk, had married a Gow woman from around there, though they were themselves of the Western Highlands to the north. So some came to be of the name Gow, and her great-great grandfather's portrait hangs in the portrait gallery at Edinburgh, a fiddle in his left hand and its bow in his right, fiddler to the Duke Atholl.
We parked in the first car park we could find there, on the Tay.
And got out buggies and bags, to tour round.
And all the more that bairn rabbitted on, 'I want to see my sheep.'
Roisin was still in her buggy, being only about 9 months old then.
So we walked round the village, and all the while Aillidh parroted, 'This isn't the way to my sheep. I want to see my sheep.'
A girl with speech delays who at the age of nearly 6 is still receiving speech therapy.
I got so sick of it I finally snapped at her, 'Then take us to your bloody sheep and be done with it!'
So she led us along, until we got to an arch in the wall I could have passed a thousand times and never noticed.
When we went through it, there was a pasture in there, full of sheep that time of year.
And up she went, though even now she's so feared she cries when we go out on our own, and I'll be damned if those fecking sheep didn't come to wire fence and sniff her hand.
Scared the beejeezus out of me and we practically ran from the place and haven't been back since.
All the worse since a couple of years I acted a fool and had what some call a ghost but I'd say it's fair demon, claiming that girl the 'dam of (a family that holds lands round there)' and 'brood mare of (same name)' and 'she marries that old, molten man'. And the other day I overheard her brushing her long hair and saying, 'I care nothing that folk say my husband is old and scarred, I love him so.'
My blood went cold.