Definition
Lawful issue refers to legitimate descendants — children, and in appropriate contexts grandchildren and further lineal descendants — born of a legally recognized marriage. The term appears most commonly in wills, trusts, and deeds, where it designates which descendants qualify to take a gift, remainder, or inheritance under the instrument.
Two interpretive dimensions have historically mattered:
1. Legitimacy. "Lawful" restricts the class to children born in wedlock or otherwise recognized as legitimate under applicable law. Children born outside marriage — historically called bastards — were traditionally excluded.
2. Scope of descent. "Issue" can mean immediate children only, or it can extend to all lineal descendants. Which meaning governs depends on the instrument's language read as a whole and the jurisdiction's rules of construction.
Common Confusion
LAWFUL ISSUE vs. HEIRS OF THE BODY. These terms overlap but are not identical. "Heirs of the body" is the older feudal formula associated with fee tail estates — it carries a specific technical meaning under the Statute of De Donis Conditionalibus (1285) and its successors, directing property to lineal descendants in perpetuity. "Lawful issue," by contrast, is used in both fee tail contexts and in ordinary remainder or conditional gift language, and its effect depends heavily on surrounding instrument language and statutory context. Courts and treatise writers sometimes equate the two in certain devising contexts, but a researcher should not assume equivalence without examining the specific jurisdiction and instrument.
LAWFUL ISSUE vs. CHILDREN. "Children" typically means first-generation descendants only. "Issue" presumptively includes all generations of lineal descent unless the instrument restricts it. A gift to "my lawful issue" may therefore pass to grandchildren and great-grandchildren if a child predeceases, while a gift to "my children" typically would not.
Why It Matters in Research
The term is a research trap on two fronts: legitimacy law and rules of construction.
On legitimacy: The traditional exclusion of illegitimate children from "lawful issue" has been substantially eroded by legislation across most U.S. jurisdictions and by constitutional decisions limiting the extent to which states may disadvantage nonmarital children in inheritance contexts. Historical documents using "lawful issue" carried a firm exclusion; modern instruments and modern interpretive statutes may reach a different result on the same language. A researcher working with pre-twentieth-century wills, trust instruments, or deed restrictions must apply the law in effect at the time of the instrument's execution or the testator's death, not modern legitimacy doctrine.
On construction: Courts have not been uniform about whether "lawful issue" in a will triggers fee tail construction (treating it like "heirs of the body") or operates as a class gift to living descendants. The Bouvier entry flags this directly — in certain devises the courts gave "lawful issue" the same effect as "heirs," a construction with significant consequences for alienability and future interests. Researchers reading older cases must identify which construction the court applied before drawing any general rule.
Corpus connections: "Lawful issue" appears with high frequency in probate records, real property chain-of-title documents, trust instruments, and domestic relations materials. A researcher examining a property dispute with historical roots should check whether any deed or will in the chain used this term and what rule of construction applied at the relevant time and place.
Historical Dictionary Support
Bouvier's entry is brief but instructive on two points. First, it confirms the judicial tendency in certain devise contexts to equate "lawful issue" with "heirs" — citing authority under the Statute of De Donis (8 Edw. I) and a Texas decision — reflecting the persistent influence of fee tail doctrine on American courts' interpretation of remainder language even after most states had abolished the fee tail by statute. Second, Bouvier states plainly that bastards cannot take a remainder in a life estate to the mother under the term "lawful issue," citing a Kentucky authority. This reflects the classical common law rule.
What Bouvier does not address is the transformation worked by the Uniform Parentage Act, state legitimation statutes, and constitutional equal protection doctrine in the twentieth century. For any research question touching instruments drafted or interpreted after roughly 1970, Bouvier's construction of the legitimacy component should be treated as historical baseline rather than operative rule.
Jurisdictional Note
Legitimacy doctrine and rules of construction for class gifts vary significantly by jurisdiction and have changed substantially over time. Several states enacted statutes providing that "issue" or "lawful issue" in a will or trust includes nonmarital children unless the instrument expressly provides otherwise. Researchers should not apply a single uniform rule; the applicable jurisdiction's law at the time of the instrument's execution and at the time of the triggering event (death, birth of a child) both potentially matter.
Encyclopedia Cross-Reference
The Law Mind Family Law Encyclopedia: Divorce — Bifurcation of Status and Property Issues. Relevant for research connecting legitimacy determinations to property distribution and inheritance rights.