According to E. Rossoni, Alberani belongs to a group of surnames derived from the Italian word albero (“tree”) and may have originated from a place name containing this root, identifying a family by its place of origin. Such surnames were often associated with local landmarks or settlements characterized by notable trees or wooded areas.

F. De Laurentiis agrees that the surname is connected to albero and notes that it may also have developed as a nickname. In this case, it could have referred to someone who lived near a prominent tree, was associated with wooded land, or whose occupation was connected with trees or timber. More broadly, the surname may preserve a reference to the natural environment surrounding the family's ancestral home.

Overall, Alberani is a surname linked to the root albero (“tree”), reflecting either a geographical origin, a local landmark, or a nickname associated with the landscape and rural life.