Sallustium
Sallustium is a Latin form of Sallustius, meaning “Sallust (C. Sallustius Crispus, historian)”. It is the genitive plural masculine noun or accusative singular masculine noun.
Found 27 times in the Latin texts on Socratos.
Where it is used
Cicero, Letters to his Friends 14.11.1: … set atque eius pietas ac dignitas postulabat. nobis erat in animo Ciceronem ad Caesarem mittere et cum eo Cn. Sallustium. si profectus erit, faciam te certiorem. valetudinem tuam cura diligenter. vale. xvii K. Quintilis.
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.