The authors agree that this is a Sicilian surname of dialect origin, derived from the term incàru, which designates the keeper or tender of young cattle.

E. Rossoni considers it a practically unique surname and places its origin probably in the Catania area, reading incàru as an occupational nickname linked to livestock rearing.

V. Blunda specifies that the term belongs to the pastoral vocabulary of the island's interior, with the sense of "young oxherd" or "lad charged with tending young cattle on the common pastures", and notes that the surname would have arisen directly from that occupation.