The legal representatives of the deceased persons is called as legal heirs.
SEc 8 of The Hindu Scuccessin Act says about the General arules of succession in the case of male;
The heris shown in this section are the legal heirs of the decesed persons
Sec 16 of Hindu Succession Act shows who are the heirs of the female Hindu.
No acendants of the signatory cannot oust thim from the inheritence.