When someone dies without a valid and enforceable will or other binding declaration, their estate is distributed to beneficiaries according to the Laws of Intestate otherwise also referred to as
Law Of Descent and Distribution.
This law is very important as it determines who is entitled to property under the rules of inheritance.
In the above scenario that you have thoroughly detailed, I can assure you of two things that will come as a shock to you and the immediate family.
Firstly is to state that the Court will not be an iota interested in the properties that have already been distributed by the Deceased - the Court can’t annul, modify or vary the decisions of the Deceased. All that will preoccupy the Court will be the intestate properties (yet to be distributed).
Secondly and importantly, the Sons of the wayward Son stand to benefit from the Estate albeit they were not his blood - He adopted them and as such had rights equal to being biological Sons.
Mind you
@Aviator, we can safely surmise that since the Deceased once conferred a property to the Son, there is no reason why he can’t be conferred to again through his beneficiaries (his Sons).
Needless to state here is to point out that the law does not discriminate along gender lines.