Definition
A Latin term from Roman and civil law meaning grandson. In legal texts and instruments drawing on the civil law tradition, nepos denotes a male grandchild — specifically, the son of one's son or daughter. The corresponding feminine form is neptis (granddaughter).
Common Language
Modern common usage (Wiktionary): Not a standard English word in general use; appears primarily in historical, genealogical, and classical contexts, where it retains the Latin meaning of grandson or descendant.
Historical common usage (Webster's 1913): Not separately entered as an English word; the Latin nepos is noted in classical references as meaning grandson, and more broadly, a descendant or spendthrift (in classical Latin literary usage).
Editorial note: Classical Latin nepos carried a wider range of meanings — including nephew and, in a pejorative literary sense, a wastrel or prodigal — that do not carry over into the legal term of art. In legal instruments, Roman law texts, and common law treatises, nepos is confined strictly to the genealogical meaning of grandson. Researchers encountering the word in a non-legal Latin context should not assume the legal meaning applies.
Common Confusion
Nepos is sometimes read as equivalent to "nephew" by researchers unfamiliar with medieval Latin legal usage. This confusion has a genuine historical basis: in later medieval Latin and in Anglo-Norman legal French, the term shifted in common usage toward nephew, and Britton renders nepos as neveu (nephew). Burrill flags this directly. In strict civil law and in Bracton's usage, however, nepos means grandson, not nephew. The two relationships carry entirely different consequences in succession, intestacy, and inheritance calculations. See also NEVEU; NEPUOY.
Why It Matters in Research
Researchers working with civil law texts, Roman law sources, or early common law treatises will encounter nepos in the context of intestate succession and the Roman law of degrees of relationship. The term appears in Justinian's Institutes in the table of relatives used to determine inheritance priority, and Bracton adopts it in the same sense. The critical research trap is the medieval drift in meaning: by the time of Britton (late thirteenth century), nepos is already being rendered as neveu in Anglo-Norman, suggesting that in later medieval English legal documents of non-Roman character, the word may be used loosely to mean nephew rather than grandson. A document's tradition — civil law, common law, or mixed — is therefore essential context for resolving the term's meaning.
In genealogical legal work, particularly inheritance disputes and probate research involving historical records, misreading nepos as nephew rather than grandson can produce an entirely wrong family tree and an incorrect distribution of an estate. The Scots cognate nepuoy adds a further layer of variation for researchers working in Scottish legal sources.
Historical Dictionary Support
All three source dictionaries agree on the core definition: nepos means grandson in the civil law tradition. Black's (both editions) provide the bare definition without elaboration. Burrill is the most instructive, situating nepos within the full civil law table of ascending and descending relatives (avus/avia above; nepos/neptis below), citing Justinian's Institutes and Bracton directly, and flagging the Britton rendering as neveu and the Scots derivative nepuoy. Burrill's treatment is the most useful starting point for a researcher because it both anchors the term in its Roman law context and signals the instability of the term across medieval legal traditions. None of the three dictionaries address the classical Latin literary meaning of nepos as prodigal or spendthrift — a meaning that is entirely absent from legal usage and need not concern legal researchers.
Jurisdictional Note
The civil law meaning (grandson) governs in sources drawing on Roman or continental law. In early English common law texts, particularly Bracton, the same meaning applies. In later medieval English and Scottish sources, usage may drift toward nephew; Scottish legal tradition preserves a distinct cognate form (nepuoy). Modern legal systems do not use the Latin term in operative instruments, so jurisdictional variation is primarily a historical research concern.