In various forms (such as Xuarab, Xuer(e)p Xiuireb, and Scuereb), we find this surname listed on the Militia Roster of 1417, with roots in Sicily dating back to the twelfth century.
Most likely from the Arabic name Abû shawàrib, referring to someone who had an impressive moustache. Alternatively, shârib and shuraba mean ‘great drinker’.
A bend in or represents defence whilst an azure field is a symbol of loyalty. The two heads likely refer to military victories.