Definition
In Roman civil law, atavia denotes a specific degree of lineal female ancestry: the great-grandmother's grandmother, representing the fifth degree of direct female ascent from a given person. The term belongs to the precise kinship vocabulary of Roman law, which assigned distinct Latin designations to each ascending generation of relatives for purposes of inheritance, intestate succession, and the calculation of degrees of consanguinity.
Why It Matters in Research
Atavia is a term of art in Roman civil law kinship nomenclature and surfaces almost exclusively in texts dealing with the degrees of succession under the Institutes of Justinian and Gaius. Researchers encountering this term in historical legal materials are almost certainly working with sources that derive from or comment upon Roman or civil law inheritance schemes — not common law sources, where equivalent precision in naming remote female ancestors was not maintained.
The primary research trap is the inconsistency across historical dictionaries. Black's first edition renders it as "a great grandmother's grandmother," the second edition substantially agrees, and Burrill likewise gives "a great grandfather's grandmother" — the divergence between female-line and male-line attribution reflects scribal or editorial inconsistency across editions rather than two distinct legal concepts. Rapalje & Lawrence's entry is corrupted by apparent typesetting errors, mixing the definition with unrelated citations and abbreviations, and should be treated with caution as a standalone authority.
Researchers using any of these dictionary sources to establish meaning in a historical document should go upstream to the Institutes of Justinian, Book III, which is the primary source Burrill cites, and which provides the authoritative enumeration of the ascending degrees of kinship in Roman succession law. The dictionary entries are secondary glosses, not independent definitions.
In practice, atavia appears in the company of its male counterpart atavus (great-grandfather's grandfather) and the broader family of Latin kinship terms — proavus, abavus, tritavus — that map out the ascending line. If a historical legal text uses atavia, the document is almost certainly concerned with the civil law of succession or consanguinity, and the researcher should expect the full terminological apparatus of Roman kinship to be operative in the surrounding text.
Historical Dictionary Support
All four historical dictionary sources agree on the essential meaning: a female ancestor several generations removed, specifically in the fifth degree of direct ascent. The points of variation are minor but worth noting for textual work.
Black's first edition gives "a great grandmother's grandmother," which counts up four generational steps from the subject. The second edition is consistent. Burrill specifies "a great grandfather's grandmother," which would make her a female ancestor reached through a male line — a distinction that may reflect either a different reading of the source or simply loose usage in secondary glossing. Rapalje & Lawrence's entry is unreliable as printed, appearing to have merged the definition with extraneous case citation material; the definition line ("A great-grandfather's grandmother") aligns with Burrill.
No historical dictionary source provides meaningful doctrinal context beyond the bare definition. None explains the term's function in Roman succession law, its relationship to the parallel male terminology, or the practical stakes of identifying this particular ancestral degree. Researchers should not rely on any of these entries as explanatory — they are identification aids only.