He was possibly also related to Tomás Alegre Manzanares (1853-1911) an officer of the Argentine Navy, who was married to Corina Caravia Gutiérrez, widow of Guillermo Brown Blanco. The Alegre family was related to livestock (cimarron cattle) in Argentina since the beginning of the conquest. In 1837, his son Saturnino Alegre Espinosa, sold a plot of 225 hectares to its neighbor Hannah Brocksopp, a female landowner of English origin.