Originally Posted by
AK lawyer
Afraid I'm missing your point. The OP, a trustee of some sort, and the PR of the grandmother's estate together have a duty to see that appropriate shares of this money goes to the respective estates of the deceased heirs of the grandmother. It is not up to either trustee or PR to figure out who are the heirs of the grandmother's deceased heirs.
Whether distribution of this portion of grandmother's estate is done per stirpes, per capita, or otherwise, presumably is dictated by the grandmother's will &/or the trust instrument. And, I am sure, OP and OP's cousin have already figured out how to do that, having previously distributed the bulk of the estate & trust. How it is to be distributed to the dead heirs' heirs ( I]per stirpes[/I], per capita)is, I repeat, none of their business..