An elderly person lost their son in later life and, upon death, left behind real estate and savings. The remaining siblings argued that since the eldest brother had passed away, his share should be divided equally among the surviving brothers and sisters. However, the grandson contended that he should inherit his father's portion of the grandfather's estate. Judicial standards are clear: when a child of the decedent dies before the decedent, that child's direct lineal descendants shall inherit by subrogation. The grandson's share, as a subrogated heir, is limited to the portion his father would have been entitled to inherit and cannot be deprived by other uncles or aunts.

  Pursuant to Article 1128 of the Civil Code, if a decedent's child dies before the decedent, the child's direct lineal descendants shall inherit by subrogation; if a decedent's sibling dies before the decedent, the sibling's children shall inherit by subrogation. A subrogated heir generally may inherit only the share of the estate that the subrogated heir would have been entitled to inherit. The subrogated inheritance by grandchildren is, in essence, a transfer of the right of inheritance, safeguarding the property interests of the lineage of the predeceased child and preventing their expectation of inheritance from being frustrated due to premature death.

  The application of subrogated inheritance requires three conditions: first, the person being subrogated (the elderly person's son) must have died before the elderly person; second, the person being subrogated must not have lost their right to inherit. If the son was legally determined by a court to have forfeited his inheritance rights due to abuse or abandonment of the elderly person during his lifetime, then the grandson likewise has no right to subrogate. Third, the subrogated heir must be a direct lineal descendant of the person being subrogated, including grandchildren and great-grandchildren, regardless of whether they were born in or out of wedlock; non-marital grandchildren also enjoy the right of subrogation. It is important to note that if the son dies after the elderly person but before the estate is divided, the applicable rule is trans-inheritance rather than subrogated inheritance. These two concepts differ in timing and legal rules, and should not be confused.

  The allocation of shares is limited to the portion that the father would have been entitled to. The elderly person had two sons and one daughter. The eldest son predeceased the elderly person and left one son. At the time of the elderly person's death, the first-order heirs were the second son, the daughter, and the eldest son's son, who inherited by representation. The grandson, inheriting by representation, received one-third of the share that the eldest son would have obtained; the second son and the daughter each received one-third. If the eldest son had left two sons, those two grandsons would jointly receive that one-third share, dividing it equally between themselves. Representation inheritance applies only in cases of statutory succession. If the elderly person executed a valid will designating the property to another person, the will takes precedence, and the grandson has no right to assert representation inheritance against it.

  When grandchildren assert their right to subrogated inheritance, they should prepare the father's death certificate, proof of the parent-child relationship with the father, and proof of the familial relatio  nship between the father and the grandparents. If other heirs deny the right of subrogation, they may file an inheritance dispute lawsuit; the court shall directly determine the respective shares in accordance with the aforementioned rules.

  In addition to subrogated inheritance, there is another adjacent legal institution worth understanding. Article 1129 of the Civil Code stipulates that a widowed daughter-in-law who has fulfilled the primary obligation of supporting her parents-in-law, or a widowed son-in-law who has fulfilled the primary obligation of supporting his parents-in-law, shall be treated as a first-order heir and participate in the inheritance; this right is not forfeited upon remarriage. When an elderly person loses a child in later life, if the daughter-in-law or son-in-law has provided long-term and diligent care, their inheritance status is independently recognized by law and operates concurrently with the subrogated inheritance rights of grandchildren. When families negotiate the distribution of an estate, incorporating the rights of both categories of persons into a comprehensive consideration helps prevent omissions that could lead to subsequent litigation, ensuring that the distribution plan is complete and effective from the outset.

  In summary, when a son predeceases his parent, the grandchildren inherit by subrogation the share that would have belonged to their father, and no uncles or aunts have the right to encroach upon it. The system of subrogation safeguards the transmission of property within each bloodline branch, reflecting the inheritance law's equal protection for every generation of descendants.