The ancient Catasti are online at the State Archive of L'Aquila
, where it is possible to select the two volumes of the "Catasti Antichi", "S102 - Catasto di S Eustacchio e Casentino dentro", and "T53-6 Casentino e S Eusanio Extra" and browse through the images of each page. The handwriting is a kind of shorthand, on some pages aside to the right variations in the properties are recorded with date (around 1530). The names are only those of owners, not of the family, but there are annotations of who received each property in the succession, therefore each name includes 2-3 pages of writing.
This catasto often includes after the names "from Casentino" or "from Sant'Eusanio", the two small hamlets that today make the comune of Sant'Eusanio Forconese. The surnames that seem to still appear in 1743 and 1749 (catasto onciario) are: ANTONUCCI, CAROSONE, CASCIOLA, D'ANGELO, D'ANTONIO, DI GIOVANNI, MASCI.