Definition
A Latin phrase meaning, literally, "people of the kingdom" or "people of the region." In its specialized historical legal usage, Regni Populi refers to the inhabitants of the English counties of Surrey and Sussex, and the coastal populations of Hampshire — a designation drawn from early medieval geography and recorded in legal antiquarian sources.
The term does not describe a legal status, right, or doctrine. It is a toponym of legal-historical interest, identifying a particular population by their territorial association with the ancient kingdom or region known as the Regnum (the realm or kingdom, sometimes associated with the sub-kingdom of the South Saxons and adjacent areas in pre-Norman England).
Why It Matters in Research
This term will appear almost exclusively in historical legal dictionaries, legal antiquarian works, and treatises drawing on early English customary or feudal materials. Its presence in Black's Law Dictionary reflects the nineteenth-century tradition of encyclopedic legal lexicography, which preserved terminology from much older sources — here, Blount's Fragmenta Antiquitatis and related works — regardless of whether the term retained any operative legal function.
Researchers encountering Regni Populi in a primary source should treat it as a geographic-demographic marker, not a term of legal art. It signals that the document or source is engaging with early English territorial organization, possibly in connection with customary law, land tenure, or jurisdictional boundaries particular to Surrey, Sussex, or coastal Hampshire. Such sources belong to a layer of English legal history predating or immediately following the Norman Conquest.
A critical research trap: do not conflate this term with broader Latin phrases using Regni or Populi independently. Regni in other legal contexts appears in phrases such as Leges Regni (laws of the kingdom) or Rex et Regnum constructions, which carry entirely different and operative legal meanings. Populi similarly appears in constitutional and Roman law contexts — Senatus Populusque Romanus, Lex Populi — where it carries weight as a source of sovereign authority. Regni Populi, by contrast, is a fixed antiquarian label for a specific people, not a constitutional concept.
The term's appearance in both the first and second editions of Black's without modification confirms it was carried forward as a lexicographic artifact rather than updated for any evolving legal usage. There is no modern American or English legal context in which this phrase would appear as operative terminology.
Historical Dictionary Support
Both Black's Law Dictionary (first and second editions) provide identical, minimal entries: a name given to the people of Surrey and Sussex and the seacoasts of Hampshire, with attribution to Blount. Thomas Blount's Fragmenta Antiquitatis (also known as Ancient Tenures of Land and Jocular Customs of Some Manors) is the clear source — a seventeenth-century antiquarian compilation of early English customary and feudal records. Black's offers no further elaboration in either edition, which itself is instructive: this is a term preserved for completeness and historical record, not for practical legal application.
The historical dictionaries agree entirely, which is unremarkable given the second edition's near-verbatim reproduction of the first on this point. Neither source explains the linguistic or historical origin of the Regnum designation as it applied to this region, nor does either situate the term within a broader discussion of early English kingdoms. Researchers seeking that context will need to look beyond legal dictionaries to historical sources on the Anglo-Saxon Heptarchy and the sub-kingdom of Sussex.
What the historical sources miss: no legal dictionary entry for this term addresses why these particular coastal and inland populations warranted a distinct Latin designation, what legal consequences (if any) flowed from being identified as Regni Populi in early records, or how the term interfaced with customary practices or tenure arrangements specific to the region. Those questions require engagement with primary historical sources, not lexicographic tools.