Now post their death that I want to know if the other children of my grandparents (1 more daughter and 2 sons)are eligible to get any amount from this fixed deposit of my grandparents.
The fixed deposit amount in the name of your grandfather, if was not transferred through any testamentary disposition during his lifetime, it shall be intestate. Though your aunt is the nominee,her role is only to receive the money on behalf of all legal heirs and to disburse them equally to all of them and since she too is one among the legal heirs she can take a share due to her from it.
My father as a son also has tried to take care as much possible.
But aunt is declining to share the fixed deposit.
Pls request your help. Some legal advice.
Your father can issue a legal notice to the bank restraining them from disbursing the amount to her as he is also one of the legal heirs and simultaneously he may file an injunction suit as well as the relief of partition seeking his share in the amount as well restraining the bank from disbursing the amount till the disposal of the suit by the court.
She cannot take away the entire amount herself.