Illustrious stock of the ancient nobility, originating in Catalonia and transplanted in Sicily by one Manfredo Petruso who was honored with numerous commissions by King Frederick II and who in 1229 acquired the fief of Bubenetto. The House of Petruso also owned the fiefs of Ragamulsuri and Pollicarni. It flowered primarily in Catania, Castrogiovanni, Palermo and other locations on the Island and was represented by many noted men who continued to seek acclaim and who filled the most prominent positions in the cities where they resided. It was accepted into the Sovereign military Order of Malta. — which is the oldest and noblest of the Chivalric Orders existing today and for which it was and still is necessary for those seeking membership to demonstrate that they are part of an old established Noble family — in the person of Carlo in 1578, of Giuseppe in 1595 and of Giovanni Petruso, colonel in the service of the Republic of Veneta, in 1671. Its current true and legitimate decedents, through reconstruction of the genealogical tree of the family itself, may reclaim its ancestral nobility.

Famiglia d'antica nobiltà in Castrogiovanni, che il Pirri fa risalire all'epoca del conte Ruggiero.
Altri la crede originaria di Catalogna ove nobilmente visse, ed il Mugnos ne riporta per primo ceppo un Manfredo Petroso da rè Federico II onorato di varie cariche, acquistato avendo il feudo e casale di Bubunetto jure francorum 1229. Fiorirono: un Antonio barone di Bubunetto; un Pompilio barone di Ragalmursuri; un Tommaso barone di Pullicarini, ed i cavalieri gerosolimitani fra' Carlo 1578, fra' Giuseppe 1595 e fra' Giovanni 1671, colonello della veneta repubblica.
Arma: d'azzurro, con la banda di oro, accompagnata da sei biglietti di oro, poste in banda 2 e 1, nel capo, ed 1 e 2 nella punta. ()