For Manuel Benito Moliner, from the Instituto de Estudios Altoaragoneses, there are four possible etymologies or explanations for the origin of the toponym: firstly, it could be an anthroponym, that is, a toponym derived from a name or anthroponym, which in this case would be that of the holder of the estate or fundus, a Viscus in Latin; the second possibility would be to relate it to the word forest (bosque); the third, to derive it from osca, in the sense of land put under cultivation (which could fit with the late cultivation of the Garcipollera on the land of Bescós).

[2] Around 1080, Garcipollera (and Bescós with it) became dependent on the monastery of San Juan de la Peña, forming part of a single priory.

[2] Between 1859 and 1863, at a time of strong expansion of the arable land in the province of Huesca due to the phenomenon of the ploughing of communal mountains after the disentailment of Mendizábal, there is evidence of the sale at auction of several hills of Bescós.

Its forests were then planted with pine trees in an attempt to delay the filling of the reservoir basin with the materials carried by the erosion caused by rainfall.

Demographic data for the town of Bescós de Garcipollera in 1900:[5][6] Demographic data of the municipality of Bescós de Garcipollera since 1842:[7] The parish church of San Miguel stands out, with a Romanesque floor plan from the 12th century, although it underwent major reconstruction in the 17th or 18th centuries.