If they are married & live in Italy, the wife would still have her original name as we don't change our name after marriage here. The children will have the husband's surname. Never met anyone called Amanda in Italy and as previous posters have mentioned, surnames are regional actually lots of first name are too. More common is Nicola for man and or Nicolo who might be called Nico for short
Some common surnames I know of are Perego, Pastore, Rossi, Esposito, Bianchi, Romano e Colombo.