If a deceased does not have a will. Has no wife or children. Has siblings one who
Is deceased but has children. Does the share of the d3ceased sibling go to
Their children?
Assuming Canadian/Ontario law is similar to that of pretty much all U.S. states in this regard:
If a person dies without a will and is not survived by a spouse or issue (children, grandchildren, etc.), then the estate goes to the deceased's parents. If neither parent is alive, then the estate goes to issue of the deceased's parents -- typically
per stirpes.
What that means is that, if Bob dies and is survived by his sister Abby, brother Charles, and children of predeceased sister Diana, Emily and Frank, the estate will be divided as follows:
Abby gets 1/3
Charles gets 1/3
Emily gets 1/6 (1/2 of Diana's share)
Frank gets 1/6
And how would these children know the details .. would the court send a letter?
Details of what? In most cases, Emily and Frank will be aware that their Uncle Bob has died. As far as administration of the estate goes, the person who seeks to be appointed as executor/administrator of the estate will be obligated to identify all of Bob's heirs. I suppose it's possible that Emily and Frank were estranged from Bob and that whoever seeks to probate Bob's estate isn't aware of Emily's and Frank's existence (although that would seem odd if that person knows about Abby and Charles). However, it is certainly possible that Emily and Frank might not get what's coming to them if the persons involved don't know about them or fail to notify them.
Again, all of the above is based on U.S. law, and Canadian/Ontario law might be quite different.