Judy
It sounds like a mess.
I’m assuming this is real estate instead of personal property.
You need to do a title search to determine who really owns the property.
Sometimes people think they are heirs when they really are not.
You can often get heirship affidivats to solve heir disputes
I doubt that this whole thing is worth the hassle and expense of an suit for quiet title or even worse a partition suit.
Too bad that you found any of them – or you could just take it over with adverse possession — which may still be a possibility once you know who is actually is title or who the real heirs are.
Jackie