calotte

zucchetto (skullcap worn by Roman Catholic clergy); kippah (Jewish cap); calotte (religious skullcap); cap worn by students of Belgian Catholic universities after the corona ceremony (a sort of hazing); tap, knock on the head, buffet, smack, cuff

Borrowed from Old Occitan calotta, calota, either an extension of French cale (“a kind of bonnet”), or from Arabic كَلُّوتَة (kallūta, “a headdress consisting of a small cap with a giant turban, or only the small cap”). See also French calot and Latin calautica, kinds of caps.