Definition
In Roman and civil law, a person whose father was still living at the relevant time. The term designates a specific civil status: a child or individual who had not yet experienced the death of their father and therefore remained, in legal contemplation, under the shadow of paternal authority or lineage. The counterpart term for one whose mother was living is *matrimus*. Together, *patrimus et matrimus* described a person with both parents living — a status that carried ritual and legal significance in Roman practice, particularly in religious ceremonies and the taking of oaths.
Common Confusion
PATRIMUS is frequently encountered only in the compound phrase *patrimus et matrimus* and rarely appears alone in legal sources. Researchers who encounter the compound may not recognize that each component carries independent meaning. *Patrimus* refers solely to the paternal condition (father living); *matrimus* solely to the maternal condition (mother living). The phrase as a whole does not simply mean "having parents" in a general sense — it specifies that both parents are alive simultaneously, a status that Roman law and certain ritual contexts treated as legally or ceremonially significant.
Why It Matters in Research
This term appears almost exclusively in sources dealing with Roman law, civil law reception, or historical ecclesiastical and ceremonial practice. Researchers are unlikely to encounter *patrimus* standing alone in case law or statutory materials; its appearances cluster in learned treatises, civil law commentaries, and discussions of Roman religious practice. When the term surfaces in primary sources, it signals a text drawing directly on Roman or continental civil law tradition rather than common law.
The key research trap is failing to recognize *patrimus et matrimus* as a technical phrase of art rather than simple biographical description. In Roman sources, the requirement that a witness or participant in a ceremony be *patrimus et matrimus* was a formal legal or ritual qualification, not a casual observation about family status. Treating it as mere background description will cause a researcher to miss its operative legal significance in context.
Corpus researchers should note that the term's appearance in a document is itself a dating and provenance clue — it indexes a text to Roman law sources, humanist legal scholarship, or canon law commentary rather than to indigenous common law development.
Historical Dictionary Support
Burrill's Law Dictionary provides a compact and accurate entry, citing Calvinus's *Lexicon Juridicum* and Spelman's *Glossarium* as authorities. Burrill correctly identifies the derivation from *pater* (father) and the core meaning — one who had a father living — without elaboration on why the status mattered. The entry is purely definitional and does not discuss the term's ritual significance or its typical pairing with *matrimus*.
What historical dictionaries uniformly omit is the functional context: Roman law deployed this status qualification most visibly in connection with the *camilli* (attendants at religious ceremonies) and in the *fetial* ritual tradition, where the presence of a person with both parents living was considered auspicious or legally requisite. This ceremonial dimension is absent from the standard legal lexicons, which treat the term as a civil status designation without explaining its operative weight.
Spelman's *Glossarium Archaiologum*, referenced by Burrill, covers the term within its broader treatment of Roman legal vocabulary absorbed into medieval learned legal discourse, which is the appropriate context for understanding why the word appears in post-classical and humanist legal writing at all.
Jurisdictional Note
This term has no operative force in modern common law or civil law jurisdictions. It is a historical term of Roman law and appears in contemporary legal research only in historical, comparative, or scholarly contexts.