Etymology
From Latin Arsacidēs, from Ancient Greek Ἀρσακίδης (Arsakídēs), from Ancient Greek Ἀρσάκης (Arsákēs, “Arsaces”) [from Old Persian 𐎠𐎼𐏁𐎣 (a-r-š-k /aršaka-/); see there for more] + -ίδης (-ídēs, patronymic suffix). By surface analysis, Arsaces + -id.