Definition
A Latin maxim from French civil law meaning, literally, "paternal things to paternal heirs." The rule required that property a decedent inherited or received from his father's line must pass, upon the decedent's death, to heirs on the father's side of the family — not to maternal relatives, and not into a general undifferentiated estate. The principle reflects a succession system built around the concept of propres: property that retains its ancestral character and must return to the family line from which it came, rather than being freely redistributed across bloodlines.
The companion maxim is MATERNA MATERNIS — maternal property to maternal heirs. Together, the two rules formed the backbone of the French customary law of succession, which treated inherited property as belonging, in a meaningful sense, to a lineage rather than solely to the individual who held it.
Common Confusion
Paterna paternis is sometimes loosely described as a rule of inheritance generally, but it is not a universal common law principle. It originates in French customary law and entered English-language legal dictionaries largely as a reference concept for understanding civil law succession systems, French legal history, and Louisiana law. Researchers should not assume the rule applies in common law jurisdictions without specific statutory or codified authority. It is also distinct from primogeniture, which determines which heir within a line takes; paterna paternis determines which line of heirs takes at all.
Why It Matters in Research
Pattern: Historical evolution with strong civil law / common law boundary.
Researchers encountering paterna paternis in historical sources are almost certainly working in one of three contexts: (1) French customary law or its scholarly commentary, (2) Louisiana succession law, particularly pre-codification or early codification sources where French civilian doctrine shaped the rules directly, or (3) comparative law treatises contrasting civil and common law inheritance systems.
The rule has essentially no operative role in American common law states. Its appearance in Black's and Rapalje & Lawrence reflects the encyclopedic ambition of those dictionaries to capture civil law concepts for an American legal audience, not an indication that the rule had broad domestic application.
For Louisiana researchers specifically: the concept of propres — property tied to its ancestral line — was a live issue in early Louisiana succession doctrine, and paterna paternis is the doctrinal expression of how paternal propres were treated. Post-codification Louisiana law reorganized succession rules substantially, so researchers should track carefully whether a source pre- or post-dates the relevant code provisions. Citing a maxim from a pre-codification treatise as though it describes current Louisiana law is a significant research trap.
The maxim also appears in older American and English treatises on the conflict of laws, where courts and scholars debated which jurisdiction's succession rules governed property with cross-border connections. In that context, paterna paternis may appear as shorthand for the civil law approach being contrasted with an English rule.
Historical Dictionary Support
All three source dictionaries are in close agreement. Black's (both editions) defines paterna paternis as a rule of French law requiring that property received from the father must descend to paternal heirs. Rapalje & Lawrence adds useful texture by referencing Bouvier and framing the concept in terms of succession specifically, clarifying that the property "coming from the father of the deceased" descends to paternal relations.
The entries are brief across all three sources, which reflects the term's status as a reference concept rather than a term with complex domestic doctrinal development. None of the dictionaries address Louisiana law directly or trace the maxim's fate in American codification — a gap researchers should note. The reliance on Bouvier in Rapalje & Lawrence is characteristic of how nineteenth-century American dictionaries handled civil law concepts: by channeling them through Bouvier's digest rather than engaging primary French sources.
Jurisdictional Note
The rule is a product of French customary law and has direct relevance primarily in Louisiana and in comparative civil law research. It has no established footing in common law inheritance doctrine. Researchers working in other American jurisdictions will encounter this term only in historical, comparative, or conflict-of-laws contexts.