Demetrium
Demetrium is a Latin form of Demetrius, meaning “Demetrius, name of Macedonian and Syrian kings; Demetrius of Phalerum”. It is the genitive plural masculine noun or accusative singular masculine noun.
Found 43 times in the Latin texts on Socratos.
Where it is used
Cicero, De Officiis 2.26: … n a paucis, ut hic noster, sed in quem universa Agrigentinorum multitudo impetum fecit. Quid? Macedones nonne Demetrium reliquerunt universique se ad Pyrrhum contulerunt? Quid? Lacedaemonios iniuste imperantes nonne repente omnes …
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.