Definition
A term from Roman civil law designating a specific female ancestor in the collateral line: the sister of one's great-great-great-grandfather (that is, the sister of the paternal or maternal ancestor four generations above the grandparent level). The term identifies a precise degree of kinship within the elaborate Roman system of computing consanguinity, where exact relational labels were assigned to virtually every cognate and agnate relative.
Why It Matters in Research
Atamita is not a working term in modern common-law practice. Researchers encounter it almost exclusively in three contexts: (1) reading medieval English legal treatises that borrowed Roman civil-law vocabulary to describe degrees of kinship relevant to inheritance or prohibited marriages; (2) interpreting ecclesiastical court records, where Roman-derived consanguinity tables governed impediments to marriage; and (3) annotating civil-law jurisdictions' historical sources on succession.
The chief research trap is the inconsistency among historical sources on exactly which ancestor's sister is meant. Black's 1st edition says great-great-great-grandfather's sister; Black's 2nd edition appears to say great-great-grandfather's sister (a generation off); Rapalje & Lawrence describes her as the sister of a great-grandfather's grandfather, which resolves to the same degree as Burrill — the sister of the atavus (great-great-great-grandfather). This one-generation discrepancy between editions of Black's is not a substantive legal dispute; it reflects the compounding difficulty of translating Roman generational terminology into English, and researchers should treat Burrill's gloss ("atavi soror") as the anchor since it ties the term directly to atavus, the well-established Roman term for the fifth-generation direct male ancestor.
Note also that Burrill records the variant atamita magna from Fleta (the 13th-century English legal treatise), suggesting that even medieval English lawyers recognized a further extension of the term. A researcher working in Fleta or in sources citing Fleta should be alert to this distinction.
Historical Dictionary Support
The four shelf sources broadly agree on the substance while differing in precision. Burrill is the most useful: it supplies the Latin gloss (atavi soror), connects the term to its root (atavus), and cites Hale's History of the Common Law and Fleta — the two most likely places a common-law researcher would encounter the term in context. Black's 1st and Rapalje & Lawrence are consistent with Burrill in placing atamita five generations above the subject in the collateral female line. Black's 2nd edition appears to drop a generation in its phrasing, likely a typographical or editorial compression rather than a substantive redefinition.
None of the historical dictionaries addresses the practical use of atamita in English common-law courts, because it had virtually none. Its appearance in Hale and Fleta is taxonomic — these authors were mapping the Roman kinship system for comparative or scholarly purposes, not reporting a term in active English legal use. Researchers should treat atamita as civil-law vocabulary preserved in English legal literature rather than as a term of art with an independent common-law career.
Jurisdictional Note
Atamita belongs to Roman civil law and has no formal role in modern common-law jurisdictions. It retains relevance in civil-law countries whose succession codes trace Roman ancestry terminology, and in historical research involving canon law consanguinity computations applicable across medieval European jurisdictions.