Dino Di Laurentiis' name

Why does this name end with an s, when I can’t think of a single other “normal” Italian name or noun that doesn’t end in a vowel? Di Laurentiis almost looks Latin. Are they a very old family that, in the early Middle Ages, refused to drop the final consonant while everyone else did? Or are such names common in the Naples region, where the director comes from?


Can some Moderator please move this to GQ.

I’ll repost my OP to GQ.