It means that he is originally from Villaralbo, a Spanish town in the Province of Zamora. Which relates to Villaralbo.
VILLARALBINO in Spain: native to Villaralbo, municipality and municipality of the province of Zamora, in the autonomous community of Castilla y León
Gentilicio de Villaralbo, municipality of Zamora one kilometer from the Douro, almost 2 . 000 inhabitants. In the Middle Ages villare albus, farm then converted into a realengo villa.