I forgot to do this yesterday but I thought I'd do it because it really does show how nearly all of Maltese ancestry is Sicilian. Mostly all of the Sicilian equivalents come from Agrigento and Caltanissetta.

Many of these are of Siculo-Arabic origins so it makes sense they'd peak in the areas where Arabic was spoken longest in Sicily.

Of the top 10 Maltese surnames, only Micallef is not found in Sicily. Of the most common surnames, only Asciak, Curmi, Seychell, Agius, Ellul, Dingli, Hili, and Xuereb are unrecorded in Sicily.

Borg -- Burgio
Camilleri
Vella
Farrugia -- Farruggia/Ferruggia
Zammit -- Zambito/Zambuto/Zammitto
Galea
Grech -- Greco
Attard -- Attardo
Spiteri -- Spiteri/Spitaleri/Spitale
Sciberras -- Sciabbarrasi
Azzopardi -- Zuppardo
Portelli
Brincat -- Brancato
Calleja -- Callea
Balzan -- Balsano
Camenzuli -- Caminsuli (this surname no longer exists)
Muscat -- Moscati/Moscato/Muscato
Caruana
Scicluna -- Scicolone
Scerri/Xerri -- Scerra
Axiaq -- Ascia
Buttigieg -- Buttice
Zahra -- Zara
Busuttil -- Busuito
Saliba -- Salliba
Schembri
Cassar -- Cassaro/Cassara
Mangion -- Mangione
Falzon -- Falzone
Pace
Bugeja -- Buggea
Tabone
Vassallo
Cutajar -- Cutaia