In Justinian's Digest (Dig.), "Octavenus" is a proper noun referring to a minor Roman jurist who flourished during the reigns of the Emperors Domitian, Nerva, and Trajan (late 1st to early 2nd century CE). [1, 2, 3]

Because it is a specific legal scholar's name, the Latin and English equivalents for the word throughout these passages are:

• Latin: Octavenus (nominative case) or Octaveno (dative/ablative case depending on syntax).
• English: Octavenus. [1, 2, 3, 4, 5]

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Context of the Specific Passages

The four citations you provided preserve surviving fragments of his legal opinions as recorded by later classical jurists:

• Dig. 2.1.9 (Paulus): Discusses a scenario where a household of slaves defaces a praetor's judicial notice board (album). Octavenus argues that the master should be granted relief if the slaves conspired together under a single plot. [1, 2]
• Dig. 5.3.16-18 (Ulpianus): Addresses the recovery of an estate (hereditatis petitio). Ulpian contrasts differing legal views, noting that Octavenus held the position that a bona fide possessor is only liable to assign their specific rights of action rather than the physical assets. [1, 2]
• Dig. 36.1.67 (Maecianus): Focuses on the complex mechanics of property acquisition, trusts, and the restitution of estates via a master or a slave. Octavenus contributes to the parameters governing how an inheritance is handed over under the Senatusconsultum Trebellianum. [1, 2, 3]
• Dig. 40.5.20 (Pomponius): Features a famous quote from Pomponius on his continuous love of learning into his late seventies. Within this text, Pomponius notes that Octavenus and Aristo "very beautifully" (bellissime) reasoned a solution regarding a slave conditionally slated for freedom under a trust. [1, 2, 3]

If you are translating a specific sentence from one of these segments and need help parsing the syntax around his name, please share the full line!