Definition
A Latin term from old English law meaning a deputy — a person appointed to act in the place or on behalf of another, particularly an official or officer. The term designates one who has been delegated authority to perform the functions of a principal, without holding the principal's office in their own right.
Why It Matters in Research
Researchers encountering *deputatus* in historical English legal documents should treat it as a formal marker of delegated official authority rather than mere agency. The term surfaces primarily in medieval and early modern records — writs, pleadings, and court rolls — where Latin remained the operative drafting language. Its appearance signals a formal appointment structure: someone was acting not on their own authority but under the sanction of another's office.
Because Latin was the language of English legal records until Parliament abolished its formal use in court proceedings in the eighteenth century, terms like *deputatus* frequently appear in primary sources without translation. Researchers working in earlier plea rolls, chancery records, or Year Books will encounter it alongside cognate forms and should cross-reference with terms like *deputatus ad hoc* (deputed for a specific purpose) when the appointment was limited in scope.
The thinness of Burrill's entry — a single case citation to Brownlow's Reports, Part 2 — reflects how narrowly this term was treated even in historical legal dictionaries. That sparseness itself is a research signal: *deputatus* functioned as ordinary Latin vocabulary within the legal community and did not require elaborate definition. Modern researchers, less trained in law Latin, should not mistake its brevity in dictionaries for marginal legal significance. Deputy relationships were central to how English administrative and judicial authority was practically exercised throughout the medieval and early modern periods.
Historical Dictionary Support
Burrill's entry is brief: "L. Lat. In old English law. A deputy." The sole citation is to Brownlow's Reports, Part 2, page 331 — a seventeenth-century English law reports collection. No other major historical legal dictionaries in the Law Mind corpus supply a dedicated entry for *deputatus* as a distinct headword, reflecting the consensus view that the term required no technical elaboration beyond its Latin-to-English equivalence. The substance of the concept was instead treated under English-language entries for "deputy" and "deputation," where the functional and legal mechanics of delegated authority received fuller analysis.
What historical sources collectively miss is any sustained treatment of how *deputatus* distinguished grades or types of delegation — whether the appointee could further sub-delegate, what formalities the appointment required, or how the deputy's acts bound the principal in different procedural contexts. Researchers needing that analytical framework must look beyond the Latin headword to treatises on office and officers in English law.
Jurisdictional Note
The term is specific to old English law and its Latin-drafting tradition. It has no operative role in modern common law jurisdictions, which conduct legal proceedings in English and address deputy relationships through statutory and common law doctrines of agency, delegation, and public office. It may appear in historical documents across jurisdictions that inherited English legal forms, including early American colonial records.