Where does “cinghialone” come from?

cinghialone (Italian) comes from Italian cinghiale, from Italian singhiale, from Italian singhiare, from Vulgar Latin singlaris, from Latin singulāris, from Latin singulus, from Proto-Italic sem-g-lo-, from Proto-Indo-European sem- — together, one.

cinghialone (Italian): Large wild boar; Nickname of Italian politician...