Definition
A Latin term from old English law meaning, broadly, to substitute fraudulently — to put a false or spurious thing in the place of something true or genuine. The term carried several related but distinct applications:
1. To put one person in the place of another through deception.
2. To fraudulently substitute a false document, claim, or object for a genuine one.
3. Most specifically, to put a stranger child in place of the true heir — that is, to present a child who is not the genuine offspring or rightful heir as though they were, in order to secure an inheritance or succession that would otherwise not pass to that person.
The Burrill source preserves a Latin maxim illustrating the third sense: Aliquando partus supponitur ab uxore, et aliquando à custode, qui (mortuo vero hærede) supponit extraneum, et nutrit ut hæredem — "sometimes a child is fraudulently substituted by the wife, and sometimes by the guardian, who (the true heir being dead) substitutes a stranger and raises him as the heir." This formulation captures the legal mischief the term was designed to describe: deliberate deception aimed at diverting succession.
Common Confusion
Supponere should not be confused with supposititious, though the two are closely related — supposititious is the adjectival English derivative describing something fraudulently substituted, particularly a supposititious child (a spurious child presented as legitimate or as the true heir). Researchers encountering either term in historical sources are dealing with the same underlying legal concept. The Latin root also surfaces in suppositio, a closely related term for the act of fraudulent substitution itself. These three forms — supponere, suppositio, and supposititious — cluster together in historical legal writing and should be read in conjunction.
Why It Matters in Research
Supponere is a term of medieval and early modern English law with no direct modern statutory successor. Researchers will encounter it almost exclusively in:
— Latin legal maxims and glossaries embedded in older treatises and digests;
— Early Chancery and ecclesiastical court records dealing with disputed inheritance, legitimacy, and succession;
— Historical commentaries on the law of descent and heirship where questions of imposture or fraud in succession were treated as distinct legal wrongs.
The practical significance of the term declined as the common law developed more generalized doctrines of fraud and as succession law was codified and reformed. By the nineteenth century, the specific act that supponere described — child substitution to defraud an heir — was addressed through fraud, forgery, and related statutory offenses rather than through this Latin category.
A key research trap: the term appears truncated in many historical sources. Burrill's entry itself breaks off mid-sentence in the Latin maxim, a common artifact of early legal dictionary compilation. Researchers relying on a single historical source may be working from an incomplete formulation. Cross-referencing with other historical glossaries (Tomlin's, Jacob's, Black's early editions) is advisable when the full legal context of a passage depends on this term.
Jurisdictional note: The concept was operative in English law in the context of the common law of descent. Civilian legal traditions (Roman and canon law) addressed parallel concerns under related terminology. Researchers working in Scottish, ecclesiastical, or continental European legal sources should be alert to cognate terms in those traditions.
Historical Dictionary Support
Burrill is the primary historical dictionary source available here, and his treatment, though fragmentary, is sufficient to establish the core meaning. The entry situates supponere firmly in old English law and identifies its primary applications: general fraudulent substitution, and specifically the substitution of a false heir.
The Latin maxim Burrill quotes points toward the canonical sources of this doctrine — likely traceable through Bracton and the Romanist tradition that influenced early English jurisprudence. The two agents of fraud the maxim identifies (the wife and the guardian) reflect the specific anxieties of medieval succession law, where both parties had access to newborns and obvious motives to substitute a living child for a dead one in order to preserve or divert an inheritance.
Historical dictionaries do not universally include this term. Its absence from general legal dictionaries of the nineteenth century (or its treatment as a minor Latin gloss rather than a substantive entry) reflects its diminishing operational role as English law modernized. Burrill's inclusion of it signals his scope: he was cataloguing the full reach of Latin legal terminology in historical English sources, not merely terms in active use.