Thessalorum
Thessalorum is a Latin form of Thessalus, meaning “Thessalian”. It is the genitive plural neuter adjective or genitive plural masculine adjective.
Found 27 times in the Latin texts on Socratos.
Where it is used
Livy, Ab urbe condita 9.19.5: ipse traiecisset mare cum veteranis Macedonibus, non plus triginta milibus hominum et quattuor milibus equitum, maxime Thessalorum; hoc enim roboris erat. persas Indos aliasque si adiunxisset gentes, impedimentum maius quam auxilium traheret.
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.