Definition
An archaic Law French term meaning "blood," appearing in early Norman legal texts. The term carries the specific sense of blood as the basis of familial descent and hereditary right — the principle by which legal status, land inheritance, and feudal obligation passed through lineage. In the context of the Leges Wilhelmi Conquestoris (Laws of William the Conqueror), sainc denotes the bloodline connection that governed succession and the transmission of tenure.
Why It Matters in Research
Sainc is a term of purely historical significance. Researchers will encounter it almost exclusively in Norman and early Anglo-Norman legal texts, particularly in the Leges Wilhelmi Conquestoris and related compilations of post-Conquest customary law. Its appearance in a document is a dating and provenance signal: Law French vocabulary of this type clusters in the eleventh and twelfth centuries and indicates source material derived from or modeled on Norman custom rather than later common law development.
The primary research trap is translational. Sainc does not survive into later legal English, and its meaning — while simple — is easy to miss without a working knowledge of Law French. Researchers consulting early Norman legal texts in translation should verify which word underlies any rendering of "blood" in hereditary or succession contexts, as the Latin sanguis, the Law French sainc, and later English "blood" each carry subtly different doctrinal freight in their respective source traditions.
Corpus researchers should note that Burrill's is currently the only shelf-source indexing this term. Its absence from later dictionaries (Bouvier, Black's, Tomlin's) reflects the term's obsolescence rather than any doubt about its meaning. Do not expect to find sainc in nineteenth- or twentieth-century legal materials.
Historical Dictionary Support
Burrill's Law Dictionary provides the sole shelf entry, glossing sainc as the Law French word for blood and citing Leges Wilhelmi Conquestoris, chapter 1, section 9. The entry is minimal — Burrill offers the gloss and the citation without doctrinal elaboration — which accurately reflects the term's role as a lexical building block rather than a term of art carrying independent doctrinal weight.
No competing or diverging definitions appear across the historical dictionary corpus. The term is stable in meaning and narrow in use. What the historical dictionaries collectively omit is any discussion of sainc in relation to the broader Norman feudal framework within which blood-right operated: the principle that tenure, villeinage status, and certain personal obligations ran with the blood. That context must be drawn from secondary sources on Norman and early English feudal law rather than from the dictionary shelf.
Jurisdictional Note
Sainc is specific to the Anglo-Norman legal tradition and has no parallel currency in Scots, Welsh, or Irish legal sources of the same period. It is not a comparative or multi-jurisdictional term.