Where does “περσικών” come from?

περσικών (Greek) comes from Greek περσικός, from Ancient Greek Περσίς, from Old Persian 𐎱𐎠𐎼𐎿, from Proto-Iranian párcuš, from Proto-Indo-Iranian párćuš, from Proto-Indo-European pérḱus — chest; rib.

περσικών (Greek): Genitive plural masculine form of περσικός;...