Both Bompietro and Villarosa are very recent comunes (XVIII century). Bompietro was a small village near Petralia Soprana. In origin it was made up of some farm that take the name from the owner's family (Chiarisi: family Di Chiara; Guarraia: family Guarraia; Salerna: family Salerno; Librizzi: family Librizzi; Facitelli: family Facitelli; Alaimo: family Alaimo; Cicchettoni: family Ciccarelli). The church of Bompietro depended on that of Petralia Soprana, and in the church archive of Petralia Soprana you can find the most ancient acts of birth, marriage and death of Bompietro. The name "Bompietro", according to a legend, derives from a thaumaturge, Pietro, that lived in that country. People called him "Buon Pietro" (Good Peter). I know Bompietro very well, my mother was born there...
Villarosa is a comune in Enna province. It was founded by the family Notarbartolo. They had some sulphur-mine and people came from the nearest villages and towns to work there.
This is a book on the history of Villarosa:
Villarosa : un comune dell'Ennese minerario e rurale / Francesco Bonasera - Enna : Papiro, 1991 - 116 p. : ill. ; 24 cm.
These are books about Bompietro:
Bompietro : viaggio tra le immagini - Palermo : Antiterra, 1995 - 83 p., [4] c. di tav. : ill. ; 21 cm.
Bompietro e un viaggio / Luigi Di Salvo - Palermo : Fotograf, stampa 2009 - 165 p. : ill. ; 24 cm.